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SMTP.php 0000666 00000134513 15046664057 0006070 0 ustar 00
* @author Jim Jagielski (jimjag)
* @author Andy Prevost (codeworxtech)
* @author Brent R. Matzelle (original founder)
* @copyright 2012 - 2020 Marcus Bointon
* @copyright 2010 - 2012 Jim Jagielski
* @copyright 2004 - 2009 Andy Prevost
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
* @note This program is distributed in the hope that it will be useful - WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*/
namespace PHPMailer\PHPMailer;
/**
* PHPMailer RFC821 SMTP email transport class.
* Implements RFC 821 SMTP commands and provides some utility methods for sending mail to an SMTP server.
*
* @author Chris Ryan
* @author Marcus Bointon
*/
class SMTP
{
/**
* The PHPMailer SMTP version number.
*
* @var string
*/
const VERSION = '6.6.4';
/**
* SMTP line break constant.
*
* @var string
*/
const LE = "\r\n";
/**
* The SMTP port to use if one is not specified.
*
* @var int
*/
const DEFAULT_PORT = 25;
/**
* The maximum line length allowed by RFC 5321 section 4.5.3.1.6,
* *excluding* a trailing CRLF break.
*
* @see https://tools.ietf.org/html/rfc5321#section-4.5.3.1.6
*
* @var int
*/
const MAX_LINE_LENGTH = 998;
/**
* The maximum line length allowed for replies in RFC 5321 section 4.5.3.1.5,
* *including* a trailing CRLF line break.
*
* @see https://tools.ietf.org/html/rfc5321#section-4.5.3.1.5
*
* @var int
*/
const MAX_REPLY_LENGTH = 512;
/**
* Debug level for no output.
*
* @var int
*/
const DEBUG_OFF = 0;
/**
* Debug level to show client -> server messages.
*
* @var int
*/
const DEBUG_CLIENT = 1;
/**
* Debug level to show client -> server and server -> client messages.
*
* @var int
*/
const DEBUG_SERVER = 2;
/**
* Debug level to show connection status, client -> server and server -> client messages.
*
* @var int
*/
const DEBUG_CONNECTION = 3;
/**
* Debug level to show all messages.
*
* @var int
*/
const DEBUG_LOWLEVEL = 4;
/**
* Debug output level.
* Options:
* * self::DEBUG_OFF (`0`) No debug output, default
* * self::DEBUG_CLIENT (`1`) Client commands
* * self::DEBUG_SERVER (`2`) Client commands and server responses
* * self::DEBUG_CONNECTION (`3`) As DEBUG_SERVER plus connection status
* * self::DEBUG_LOWLEVEL (`4`) Low-level data output, all messages.
*
* @var int
*/
public $do_debug = self::DEBUG_OFF;
/**
* How to handle debug output.
* Options:
* * `echo` Output plain-text as-is, appropriate for CLI
* * `html` Output escaped, line breaks converted to `
`, appropriate for browser output
* * `error_log` Output to error log as configured in php.ini
* Alternatively, you can provide a callable expecting two params: a message string and the debug level:
*
* ```php
* $smtp->Debugoutput = function($str, $level) {echo "debug level $level; message: $str";};
* ```
*
* Alternatively, you can pass in an instance of a PSR-3 compatible logger, though only `debug`
* level output is used:
*
* ```php
* $mail->Debugoutput = new myPsr3Logger;
* ```
*
* @var string|callable|\Psr\Log\LoggerInterface
*/
public $Debugoutput = 'echo';
/**
* Whether to use VERP.
*
* @see http://en.wikipedia.org/wiki/Variable_envelope_return_path
* @see http://www.postfix.org/VERP_README.html Info on VERP
*
* @var bool
*/
public $do_verp = false;
/**
* The timeout value for connection, in seconds.
* Default of 5 minutes (300sec) is from RFC2821 section 4.5.3.2.
* This needs to be quite high to function correctly with hosts using greetdelay as an anti-spam measure.
*
* @see http://tools.ietf.org/html/rfc2821#section-4.5.3.2
*
* @var int
*/
public $Timeout = 300;
/**
* How long to wait for commands to complete, in seconds.
* Default of 5 minutes (300sec) is from RFC2821 section 4.5.3.2.
*
* @var int
*/
public $Timelimit = 300;
/**
* Patterns to extract an SMTP transaction id from reply to a DATA command.
* The first capture group in each regex will be used as the ID.
* MS ESMTP returns the message ID, which may not be correct for internal tracking.
*
* @var string[]
*/
protected $smtp_transaction_id_patterns = [
'exim' => '/[\d]{3} OK id=(.*)/',
'sendmail' => '/[\d]{3} 2.0.0 (.*) Message/',
'postfix' => '/[\d]{3} 2.0.0 Ok: queued as (.*)/',
'Microsoft_ESMTP' => '/[0-9]{3} 2.[\d].0 (.*)@(?:.*) Queued mail for delivery/',
'Amazon_SES' => '/[\d]{3} Ok (.*)/',
'SendGrid' => '/[\d]{3} Ok: queued as (.*)/',
'CampaignMonitor' => '/[\d]{3} 2.0.0 OK:([a-zA-Z\d]{48})/',
'Haraka' => '/[\d]{3} Message Queued \((.*)\)/',
'Mailjet' => '/[\d]{3} OK queued as (.*)/',
];
/**
* The last transaction ID issued in response to a DATA command,
* if one was detected.
*
* @var string|bool|null
*/
protected $last_smtp_transaction_id;
/**
* The socket for the server connection.
*
* @var ?resource
*/
protected $smtp_conn;
/**
* Error information, if any, for the last SMTP command.
*
* @var array
*/
protected $error = [
'error' => '',
'detail' => '',
'smtp_code' => '',
'smtp_code_ex' => '',
];
/**
* The reply the server sent to us for HELO.
* If null, no HELO string has yet been received.
*
* @var string|null
*/
protected $helo_rply;
/**
* The set of SMTP extensions sent in reply to EHLO command.
* Indexes of the array are extension names.
* Value at index 'HELO' or 'EHLO' (according to command that was sent)
* represents the server name. In case of HELO it is the only element of the array.
* Other values can be boolean TRUE or an array containing extension options.
* If null, no HELO/EHLO string has yet been received.
*
* @var array|null
*/
protected $server_caps;
/**
* The most recent reply received from the server.
*
* @var string
*/
protected $last_reply = '';
/**
* Output debugging info via a user-selected method.
*
* @param string $str Debug string to output
* @param int $level The debug level of this message; see DEBUG_* constants
*
* @see SMTP::$Debugoutput
* @see SMTP::$do_debug
*/
protected function edebug($str, $level = 0)
{
if ($level > $this->do_debug) {
return;
}
//Is this a PSR-3 logger?
if ($this->Debugoutput instanceof \Psr\Log\LoggerInterface) {
$this->Debugoutput->debug($str);
return;
}
//Avoid clash with built-in function names
if (is_callable($this->Debugoutput) && !in_array($this->Debugoutput, ['error_log', 'html', 'echo'])) {
call_user_func($this->Debugoutput, $str, $level);
return;
}
switch ($this->Debugoutput) {
case 'error_log':
//Don't output, just log
error_log($str);
break;
case 'html':
//Cleans up output a bit for a better looking, HTML-safe output
echo gmdate('Y-m-d H:i:s'), ' ', htmlentities(
preg_replace('/[\r\n]+/', '', $str),
ENT_QUOTES,
'UTF-8'
), "
\n";
break;
case 'echo':
default:
//Normalize line breaks
$str = preg_replace('/\r\n|\r/m', "\n", $str);
echo gmdate('Y-m-d H:i:s'),
"\t",
//Trim trailing space
trim(
//Indent for readability, except for trailing break
str_replace(
"\n",
"\n \t ",
trim($str)
)
),
"\n";
}
}
/**
* Connect to an SMTP server.
*
* @param string $host SMTP server IP or host name
* @param int $port The port number to connect to
* @param int $timeout How long to wait for the connection to open
* @param array $options An array of options for stream_context_create()
*
* @return bool
*/
public function connect($host, $port = null, $timeout = 30, $options = [])
{
//Clear errors to avoid confusion
$this->setError('');
//Make sure we are __not__ connected
if ($this->connected()) {
//Already connected, generate error
$this->setError('Already connected to a server');
return false;
}
if (empty($port)) {
$port = self::DEFAULT_PORT;
}
//Connect to the SMTP server
$this->edebug(
"Connection: opening to $host:$port, timeout=$timeout, options=" .
(count($options) > 0 ? var_export($options, true) : 'array()'),
self::DEBUG_CONNECTION
);
$this->smtp_conn = $this->getSMTPConnection($host, $port, $timeout, $options);
if ($this->smtp_conn === false) {
//Error info already set inside `getSMTPConnection()`
return false;
}
$this->edebug('Connection: opened', self::DEBUG_CONNECTION);
//Get any announcement
$this->last_reply = $this->get_lines();
$this->edebug('SERVER -> CLIENT: ' . $this->last_reply, self::DEBUG_SERVER);
$responseCode = (int)substr($this->last_reply, 0, 3);
if ($responseCode === 220) {
return true;
}
//Anything other than a 220 response means something went wrong
//RFC 5321 says the server will wait for us to send a QUIT in response to a 554 error
//https://tools.ietf.org/html/rfc5321#section-3.1
if ($responseCode === 554) {
$this->quit();
}
//This will handle 421 responses which may not wait for a QUIT (e.g. if the server is being shut down)
$this->edebug('Connection: closing due to error', self::DEBUG_CONNECTION);
$this->close();
return false;
}
/**
* Create connection to the SMTP server.
*
* @param string $host SMTP server IP or host name
* @param int $port The port number to connect to
* @param int $timeout How long to wait for the connection to open
* @param array $options An array of options for stream_context_create()
*
* @return false|resource
*/
protected function getSMTPConnection($host, $port = null, $timeout = 30, $options = [])
{
static $streamok;
//This is enabled by default since 5.0.0 but some providers disable it
//Check this once and cache the result
if (null === $streamok) {
$streamok = function_exists('stream_socket_client');
}
$errno = 0;
$errstr = '';
if ($streamok) {
$socket_context = stream_context_create($options);
set_error_handler([$this, 'errorHandler']);
$connection = stream_socket_client(
$host . ':' . $port,
$errno,
$errstr,
$timeout,
STREAM_CLIENT_CONNECT,
$socket_context
);
} else {
//Fall back to fsockopen which should work in more places, but is missing some features
$this->edebug(
'Connection: stream_socket_client not available, falling back to fsockopen',
self::DEBUG_CONNECTION
);
set_error_handler([$this, 'errorHandler']);
$connection = fsockopen(
$host,
$port,
$errno,
$errstr,
$timeout
);
}
restore_error_handler();
//Verify we connected properly
if (!is_resource($connection)) {
$this->setError(
'Failed to connect to server',
'',
(string) $errno,
$errstr
);
$this->edebug(
'SMTP ERROR: ' . $this->error['error']
. ": $errstr ($errno)",
self::DEBUG_CLIENT
);
return false;
}
//SMTP server can take longer to respond, give longer timeout for first read
//Windows does not have support for this timeout function
if (strpos(PHP_OS, 'WIN') !== 0) {
$max = (int)ini_get('max_execution_time');
//Don't bother if unlimited, or if set_time_limit is disabled
if (0 !== $max && $timeout > $max && strpos(ini_get('disable_functions'), 'set_time_limit') === false) {
@set_time_limit($timeout);
}
stream_set_timeout($connection, $timeout, 0);
}
return $connection;
}
/**
* Initiate a TLS (encrypted) session.
*
* @return bool
*/
public function startTLS()
{
if (!$this->sendCommand('STARTTLS', 'STARTTLS', 220)) {
return false;
}
//Allow the best TLS version(s) we can
$crypto_method = STREAM_CRYPTO_METHOD_TLS_CLIENT;
//PHP 5.6.7 dropped inclusion of TLS 1.1 and 1.2 in STREAM_CRYPTO_METHOD_TLS_CLIENT
//so add them back in manually if we can
if (defined('STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT')) {
$crypto_method |= STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT;
$crypto_method |= STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT;
}
//Begin encrypted connection
set_error_handler([$this, 'errorHandler']);
$crypto_ok = stream_socket_enable_crypto(
$this->smtp_conn,
true,
$crypto_method
);
restore_error_handler();
return (bool) $crypto_ok;
}
/**
* Perform SMTP authentication.
* Must be run after hello().
*
* @see hello()
*
* @param string $username The user name
* @param string $password The password
* @param string $authtype The auth type (CRAM-MD5, PLAIN, LOGIN, XOAUTH2)
* @param OAuthTokenProvider $OAuth An optional OAuthTokenProvider instance for XOAUTH2 authentication
*
* @return bool True if successfully authenticated
*/
public function authenticate(
$username,
$password,
$authtype = null,
$OAuth = null
) {
if (!$this->server_caps) {
$this->setError('Authentication is not allowed before HELO/EHLO');
return false;
}
if (array_key_exists('EHLO', $this->server_caps)) {
//SMTP extensions are available; try to find a proper authentication method
if (!array_key_exists('AUTH', $this->server_caps)) {
$this->setError('Authentication is not allowed at this stage');
//'at this stage' means that auth may be allowed after the stage changes
//e.g. after STARTTLS
return false;
}
$this->edebug('Auth method requested: ' . ($authtype ?: 'UNSPECIFIED'), self::DEBUG_LOWLEVEL);
$this->edebug(
'Auth methods available on the server: ' . implode(',', $this->server_caps['AUTH']),
self::DEBUG_LOWLEVEL
);
//If we have requested a specific auth type, check the server supports it before trying others
if (null !== $authtype && !in_array($authtype, $this->server_caps['AUTH'], true)) {
$this->edebug('Requested auth method not available: ' . $authtype, self::DEBUG_LOWLEVEL);
$authtype = null;
}
if (empty($authtype)) {
//If no auth mechanism is specified, attempt to use these, in this order
//Try CRAM-MD5 first as it's more secure than the others
foreach (['CRAM-MD5', 'LOGIN', 'PLAIN', 'XOAUTH2'] as $method) {
if (in_array($method, $this->server_caps['AUTH'], true)) {
$authtype = $method;
break;
}
}
if (empty($authtype)) {
$this->setError('No supported authentication methods found');
return false;
}
$this->edebug('Auth method selected: ' . $authtype, self::DEBUG_LOWLEVEL);
}
if (!in_array($authtype, $this->server_caps['AUTH'], true)) {
$this->setError("The requested authentication method \"$authtype\" is not supported by the server");
return false;
}
} elseif (empty($authtype)) {
$authtype = 'LOGIN';
}
switch ($authtype) {
case 'PLAIN':
//Start authentication
if (!$this->sendCommand('AUTH', 'AUTH PLAIN', 334)) {
return false;
}
//Send encoded username and password
if (
//Format from https://tools.ietf.org/html/rfc4616#section-2
//We skip the first field (it's forgery), so the string starts with a null byte
!$this->sendCommand(
'User & Password',
base64_encode("\0" . $username . "\0" . $password),
235
)
) {
return false;
}
break;
case 'LOGIN':
//Start authentication
if (!$this->sendCommand('AUTH', 'AUTH LOGIN', 334)) {
return false;
}
if (!$this->sendCommand('Username', base64_encode($username), 334)) {
return false;
}
if (!$this->sendCommand('Password', base64_encode($password), 235)) {
return false;
}
break;
case 'CRAM-MD5':
//Start authentication
if (!$this->sendCommand('AUTH CRAM-MD5', 'AUTH CRAM-MD5', 334)) {
return false;
}
//Get the challenge
$challenge = base64_decode(substr($this->last_reply, 4));
//Build the response
$response = $username . ' ' . $this->hmac($challenge, $password);
//send encoded credentials
return $this->sendCommand('Username', base64_encode($response), 235);
case 'XOAUTH2':
//The OAuth instance must be set up prior to requesting auth.
if (null === $OAuth) {
return false;
}
$oauth = $OAuth->getOauth64();
//Start authentication
if (!$this->sendCommand('AUTH', 'AUTH XOAUTH2 ' . $oauth, 235)) {
return false;
}
break;
default:
$this->setError("Authentication method \"$authtype\" is not supported");
return false;
}
return true;
}
/**
* Calculate an MD5 HMAC hash.
* Works like hash_hmac('md5', $data, $key)
* in case that function is not available.
*
* @param string $data The data to hash
* @param string $key The key to hash with
*
* @return string
*/
protected function hmac($data, $key)
{
if (function_exists('hash_hmac')) {
return hash_hmac('md5', $data, $key);
}
//The following borrowed from
//http://php.net/manual/en/function.mhash.php#27225
//RFC 2104 HMAC implementation for php.
//Creates an md5 HMAC.
//Eliminates the need to install mhash to compute a HMAC
//by Lance Rushing
$bytelen = 64; //byte length for md5
if (strlen($key) > $bytelen) {
$key = pack('H*', md5($key));
}
$key = str_pad($key, $bytelen, chr(0x00));
$ipad = str_pad('', $bytelen, chr(0x36));
$opad = str_pad('', $bytelen, chr(0x5c));
$k_ipad = $key ^ $ipad;
$k_opad = $key ^ $opad;
return md5($k_opad . pack('H*', md5($k_ipad . $data)));
}
/**
* Check connection state.
*
* @return bool True if connected
*/
public function connected()
{
if (is_resource($this->smtp_conn)) {
$sock_status = stream_get_meta_data($this->smtp_conn);
if ($sock_status['eof']) {
//The socket is valid but we are not connected
$this->edebug(
'SMTP NOTICE: EOF caught while checking if connected',
self::DEBUG_CLIENT
);
$this->close();
return false;
}
return true; //everything looks good
}
return false;
}
/**
* Close the socket and clean up the state of the class.
* Don't use this function without first trying to use QUIT.
*
* @see quit()
*/
public function close()
{
$this->setError('');
$this->server_caps = null;
$this->helo_rply = null;
if (is_resource($this->smtp_conn)) {
//Close the connection and cleanup
fclose($this->smtp_conn);
$this->smtp_conn = null; //Makes for cleaner serialization
$this->edebug('Connection: closed', self::DEBUG_CONNECTION);
}
}
/**
* Send an SMTP DATA command.
* Issues a data command and sends the msg_data to the server,
* finalizing the mail transaction. $msg_data is the message
* that is to be send with the headers. Each header needs to be
* on a single line followed by a with the message headers
* and the message body being separated by an additional .
* Implements RFC 821: DATA .
*
* @param string $msg_data Message data to send
*
* @return bool
*/
public function data($msg_data)
{
//This will use the standard timelimit
if (!$this->sendCommand('DATA', 'DATA', 354)) {
return false;
}
/* The server is ready to accept data!
* According to rfc821 we should not send more than 1000 characters on a single line (including the LE)
* so we will break the data up into lines by \r and/or \n then if needed we will break each of those into
* smaller lines to fit within the limit.
* We will also look for lines that start with a '.' and prepend an additional '.'.
* NOTE: this does not count towards line-length limit.
*/
//Normalize line breaks before exploding
$lines = explode("\n", str_replace(["\r\n", "\r"], "\n", $msg_data));
/* To distinguish between a complete RFC822 message and a plain message body, we check if the first field
* of the first line (':' separated) does not contain a space then it _should_ be a header and we will
* process all lines before a blank line as headers.
*/
$field = substr($lines[0], 0, strpos($lines[0], ':'));
$in_headers = false;
if (!empty($field) && strpos($field, ' ') === false) {
$in_headers = true;
}
foreach ($lines as $line) {
$lines_out = [];
if ($in_headers && $line === '') {
$in_headers = false;
}
//Break this line up into several smaller lines if it's too long
//Micro-optimisation: isset($str[$len]) is faster than (strlen($str) > $len),
while (isset($line[self::MAX_LINE_LENGTH])) {
//Working backwards, try to find a space within the last MAX_LINE_LENGTH chars of the line to break on
//so as to avoid breaking in the middle of a word
$pos = strrpos(substr($line, 0, self::MAX_LINE_LENGTH), ' ');
//Deliberately matches both false and 0
if (!$pos) {
//No nice break found, add a hard break
$pos = self::MAX_LINE_LENGTH - 1;
$lines_out[] = substr($line, 0, $pos);
$line = substr($line, $pos);
} else {
//Break at the found point
$lines_out[] = substr($line, 0, $pos);
//Move along by the amount we dealt with
$line = substr($line, $pos + 1);
}
//If processing headers add a LWSP-char to the front of new line RFC822 section 3.1.1
if ($in_headers) {
$line = "\t" . $line;
}
}
$lines_out[] = $line;
//Send the lines to the server
foreach ($lines_out as $line_out) {
//Dot-stuffing as per RFC5321 section 4.5.2
//https://tools.ietf.org/html/rfc5321#section-4.5.2
if (!empty($line_out) && $line_out[0] === '.') {
$line_out = '.' . $line_out;
}
$this->client_send($line_out . static::LE, 'DATA');
}
}
//Message data has been sent, complete the command
//Increase timelimit for end of DATA command
$savetimelimit = $this->Timelimit;
$this->Timelimit *= 2;
$result = $this->sendCommand('DATA END', '.', 250);
$this->recordLastTransactionID();
//Restore timelimit
$this->Timelimit = $savetimelimit;
return $result;
}
/**
* Send an SMTP HELO or EHLO command.
* Used to identify the sending server to the receiving server.
* This makes sure that client and server are in a known state.
* Implements RFC 821: HELO
* and RFC 2821 EHLO.
*
* @param string $host The host name or IP to connect to
*
* @return bool
*/
public function hello($host = '')
{
//Try extended hello first (RFC 2821)
if ($this->sendHello('EHLO', $host)) {
return true;
}
//Some servers shut down the SMTP service here (RFC 5321)
if (substr($this->helo_rply, 0, 3) == '421') {
return false;
}
return $this->sendHello('HELO', $host);
}
/**
* Send an SMTP HELO or EHLO command.
* Low-level implementation used by hello().
*
* @param string $hello The HELO string
* @param string $host The hostname to say we are
*
* @return bool
*
* @see hello()
*/
protected function sendHello($hello, $host)
{
$noerror = $this->sendCommand($hello, $hello . ' ' . $host, 250);
$this->helo_rply = $this->last_reply;
if ($noerror) {
$this->parseHelloFields($hello);
} else {
$this->server_caps = null;
}
return $noerror;
}
/**
* Parse a reply to HELO/EHLO command to discover server extensions.
* In case of HELO, the only parameter that can be discovered is a server name.
*
* @param string $type `HELO` or `EHLO`
*/
protected function parseHelloFields($type)
{
$this->server_caps = [];
$lines = explode("\n", $this->helo_rply);
foreach ($lines as $n => $s) {
//First 4 chars contain response code followed by - or space
$s = trim(substr($s, 4));
if (empty($s)) {
continue;
}
$fields = explode(' ', $s);
if (!empty($fields)) {
if (!$n) {
$name = $type;
$fields = $fields[0];
} else {
$name = array_shift($fields);
switch ($name) {
case 'SIZE':
$fields = ($fields ? $fields[0] : 0);
break;
case 'AUTH':
if (!is_array($fields)) {
$fields = [];
}
break;
default:
$fields = true;
}
}
$this->server_caps[$name] = $fields;
}
}
}
/**
* Send an SMTP MAIL command.
* Starts a mail transaction from the email address specified in
* $from. Returns true if successful or false otherwise. If True
* the mail transaction is started and then one or more recipient
* commands may be called followed by a data command.
* Implements RFC 821: MAIL FROM: .
*
* @param string $from Source address of this message
*
* @return bool
*/
public function mail($from)
{
$useVerp = ($this->do_verp ? ' XVERP' : '');
return $this->sendCommand(
'MAIL FROM',
'MAIL FROM:<' . $from . '>' . $useVerp,
250
);
}
/**
* Send an SMTP QUIT command.
* Closes the socket if there is no error or the $close_on_error argument is true.
* Implements from RFC 821: QUIT .
*
* @param bool $close_on_error Should the connection close if an error occurs?
*
* @return bool
*/
public function quit($close_on_error = true)
{
$noerror = $this->sendCommand('QUIT', 'QUIT', 221);
$err = $this->error; //Save any error
if ($noerror || $close_on_error) {
$this->close();
$this->error = $err; //Restore any error from the quit command
}
return $noerror;
}
/**
* Send an SMTP RCPT command.
* Sets the TO argument to $toaddr.
* Returns true if the recipient was accepted false if it was rejected.
* Implements from RFC 821: RCPT TO: .
*
* @param string $address The address the message is being sent to
* @param string $dsn Comma separated list of DSN notifications. NEVER, SUCCESS, FAILURE
* or DELAY. If you specify NEVER all other notifications are ignored.
*
* @return bool
*/
public function recipient($address, $dsn = '')
{
if (empty($dsn)) {
$rcpt = 'RCPT TO:<' . $address . '>';
} else {
$dsn = strtoupper($dsn);
$notify = [];
if (strpos($dsn, 'NEVER') !== false) {
$notify[] = 'NEVER';
} else {
foreach (['SUCCESS', 'FAILURE', 'DELAY'] as $value) {
if (strpos($dsn, $value) !== false) {
$notify[] = $value;
}
}
}
$rcpt = 'RCPT TO:<' . $address . '> NOTIFY=' . implode(',', $notify);
}
return $this->sendCommand(
'RCPT TO',
$rcpt,
[250, 251]
);
}
/**
* Send an SMTP RSET command.
* Abort any transaction that is currently in progress.
* Implements RFC 821: RSET .
*
* @return bool True on success
*/
public function reset()
{
return $this->sendCommand('RSET', 'RSET', 250);
}
/**
* Send a command to an SMTP server and check its return code.
*
* @param string $command The command name - not sent to the server
* @param string $commandstring The actual command to send
* @param int|array $expect One or more expected integer success codes
*
* @return bool True on success
*/
protected function sendCommand($command, $commandstring, $expect)
{
if (!$this->connected()) {
$this->setError("Called $command without being connected");
return false;
}
//Reject line breaks in all commands
if ((strpos($commandstring, "\n") !== false) || (strpos($commandstring, "\r") !== false)) {
$this->setError("Command '$command' contained line breaks");
return false;
}
$this->client_send($commandstring . static::LE, $command);
$this->last_reply = $this->get_lines();
//Fetch SMTP code and possible error code explanation
$matches = [];
if (preg_match('/^([\d]{3})[ -](?:([\d]\\.[\d]\\.[\d]{1,2}) )?/', $this->last_reply, $matches)) {
$code = (int) $matches[1];
$code_ex = (count($matches) > 2 ? $matches[2] : null);
//Cut off error code from each response line
$detail = preg_replace(
"/{$code}[ -]" .
($code_ex ? str_replace('.', '\\.', $code_ex) . ' ' : '') . '/m',
'',
$this->last_reply
);
} else {
//Fall back to simple parsing if regex fails
$code = (int) substr($this->last_reply, 0, 3);
$code_ex = null;
$detail = substr($this->last_reply, 4);
}
$this->edebug('SERVER -> CLIENT: ' . $this->last_reply, self::DEBUG_SERVER);
if (!in_array($code, (array) $expect, true)) {
$this->setError(
"$command command failed",
$detail,
$code,
$code_ex
);
$this->edebug(
'SMTP ERROR: ' . $this->error['error'] . ': ' . $this->last_reply,
self::DEBUG_CLIENT
);
return false;
}
//Don't clear the error store when using keepalive
if ($command !== 'RSET') {
$this->setError('');
}
return true;
}
/**
* Send an SMTP SAML command.
* Starts a mail transaction from the email address specified in $from.
* Returns true if successful or false otherwise. If True
* the mail transaction is started and then one or more recipient
* commands may be called followed by a data command. This command
* will send the message to the users terminal if they are logged
* in and send them an email.
* Implements RFC 821: SAML FROM: .
*
* @param string $from The address the message is from
*
* @return bool
*/
public function sendAndMail($from)
{
return $this->sendCommand('SAML', "SAML FROM:$from", 250);
}
/**
* Send an SMTP VRFY command.
*
* @param string $name The name to verify
*
* @return bool
*/
public function verify($name)
{
return $this->sendCommand('VRFY', "VRFY $name", [250, 251]);
}
/**
* Send an SMTP NOOP command.
* Used to keep keep-alives alive, doesn't actually do anything.
*
* @return bool
*/
public function noop()
{
return $this->sendCommand('NOOP', 'NOOP', 250);
}
/**
* Send an SMTP TURN command.
* This is an optional command for SMTP that this class does not support.
* This method is here to make the RFC821 Definition complete for this class
* and _may_ be implemented in future.
* Implements from RFC 821: TURN .
*
* @return bool
*/
public function turn()
{
$this->setError('The SMTP TURN command is not implemented');
$this->edebug('SMTP NOTICE: ' . $this->error['error'], self::DEBUG_CLIENT);
return false;
}
/**
* Send raw data to the server.
*
* @param string $data The data to send
* @param string $command Optionally, the command this is part of, used only for controlling debug output
*
* @return int|bool The number of bytes sent to the server or false on error
*/
public function client_send($data, $command = '')
{
//If SMTP transcripts are left enabled, or debug output is posted online
//it can leak credentials, so hide credentials in all but lowest level
if (
self::DEBUG_LOWLEVEL > $this->do_debug &&
in_array($command, ['User & Password', 'Username', 'Password'], true)
) {
$this->edebug('CLIENT -> SERVER: [credentials hidden]', self::DEBUG_CLIENT);
} else {
$this->edebug('CLIENT -> SERVER: ' . $data, self::DEBUG_CLIENT);
}
set_error_handler([$this, 'errorHandler']);
$result = fwrite($this->smtp_conn, $data);
restore_error_handler();
return $result;
}
/**
* Get the latest error.
*
* @return array
*/
public function getError()
{
return $this->error;
}
/**
* Get SMTP extensions available on the server.
*
* @return array|null
*/
public function getServerExtList()
{
return $this->server_caps;
}
/**
* Get metadata about the SMTP server from its HELO/EHLO response.
* The method works in three ways, dependent on argument value and current state:
* 1. HELO/EHLO has not been sent - returns null and populates $this->error.
* 2. HELO has been sent -
* $name == 'HELO': returns server name
* $name == 'EHLO': returns boolean false
* $name == any other string: returns null and populates $this->error
* 3. EHLO has been sent -
* $name == 'HELO'|'EHLO': returns the server name
* $name == any other string: if extension $name exists, returns True
* or its options (e.g. AUTH mechanisms supported). Otherwise returns False.
*
* @param string $name Name of SMTP extension or 'HELO'|'EHLO'
*
* @return string|bool|null
*/
public function getServerExt($name)
{
if (!$this->server_caps) {
$this->setError('No HELO/EHLO was sent');
return null;
}
if (!array_key_exists($name, $this->server_caps)) {
if ('HELO' === $name) {
return $this->server_caps['EHLO'];
}
if ('EHLO' === $name || array_key_exists('EHLO', $this->server_caps)) {
return false;
}
$this->setError('HELO handshake was used; No information about server extensions available');
return null;
}
return $this->server_caps[$name];
}
/**
* Get the last reply from the server.
*
* @return string
*/
public function getLastReply()
{
return $this->last_reply;
}
/**
* Read the SMTP server's response.
* Either before eof or socket timeout occurs on the operation.
* With SMTP we can tell if we have more lines to read if the
* 4th character is '-' symbol. If it is a space then we don't
* need to read anything else.
*
* @return string
*/
protected function get_lines()
{
//If the connection is bad, give up straight away
if (!is_resource($this->smtp_conn)) {
return '';
}
$data = '';
$endtime = 0;
stream_set_timeout($this->smtp_conn, $this->Timeout);
if ($this->Timelimit > 0) {
$endtime = time() + $this->Timelimit;
}
$selR = [$this->smtp_conn];
$selW = null;
while (is_resource($this->smtp_conn) && !feof($this->smtp_conn)) {
//Must pass vars in here as params are by reference
//solution for signals inspired by https://github.com/symfony/symfony/pull/6540
set_error_handler([$this, 'errorHandler']);
$n = stream_select($selR, $selW, $selW, $this->Timelimit);
restore_error_handler();
if ($n === false) {
$message = $this->getError()['detail'];
$this->edebug(
'SMTP -> get_lines(): select failed (' . $message . ')',
self::DEBUG_LOWLEVEL
);
//stream_select returns false when the `select` system call is interrupted
//by an incoming signal, try the select again
if (stripos($message, 'interrupted system call') !== false) {
$this->edebug(
'SMTP -> get_lines(): retrying stream_select',
self::DEBUG_LOWLEVEL
);
$this->setError('');
continue;
}
break;
}
if (!$n) {
$this->edebug(
'SMTP -> get_lines(): select timed-out in (' . $this->Timelimit . ' sec)',
self::DEBUG_LOWLEVEL
);
break;
}
//Deliberate noise suppression - errors are handled afterwards
$str = @fgets($this->smtp_conn, self::MAX_REPLY_LENGTH);
$this->edebug('SMTP INBOUND: "' . trim($str) . '"', self::DEBUG_LOWLEVEL);
$data .= $str;
//If response is only 3 chars (not valid, but RFC5321 S4.2 says it must be handled),
//or 4th character is a space or a line break char, we are done reading, break the loop.
//String array access is a significant micro-optimisation over strlen
if (!isset($str[3]) || $str[3] === ' ' || $str[3] === "\r" || $str[3] === "\n") {
break;
}
//Timed-out? Log and break
$info = stream_get_meta_data($this->smtp_conn);
if ($info['timed_out']) {
$this->edebug(
'SMTP -> get_lines(): stream timed-out (' . $this->Timeout . ' sec)',
self::DEBUG_LOWLEVEL
);
break;
}
//Now check if reads took too long
if ($endtime && time() > $endtime) {
$this->edebug(
'SMTP -> get_lines(): timelimit reached (' .
$this->Timelimit . ' sec)',
self::DEBUG_LOWLEVEL
);
break;
}
}
return $data;
}
/**
* Enable or disable VERP address generation.
*
* @param bool $enabled
*/
public function setVerp($enabled = false)
{
$this->do_verp = $enabled;
}
/**
* Get VERP address generation mode.
*
* @return bool
*/
public function getVerp()
{
return $this->do_verp;
}
/**
* Set error messages and codes.
*
* @param string $message The error message
* @param string $detail Further detail on the error
* @param string $smtp_code An associated SMTP error code
* @param string $smtp_code_ex Extended SMTP code
*/
protected function setError($message, $detail = '', $smtp_code = '', $smtp_code_ex = '')
{
$this->error = [
'error' => $message,
'detail' => $detail,
'smtp_code' => $smtp_code,
'smtp_code_ex' => $smtp_code_ex,
];
}
/**
* Set debug output method.
*
* @param string|callable $method The name of the mechanism to use for debugging output, or a callable to handle it
*/
public function setDebugOutput($method = 'echo')
{
$this->Debugoutput = $method;
}
/**
* Get debug output method.
*
* @return string
*/
public function getDebugOutput()
{
return $this->Debugoutput;
}
/**
* Set debug output level.
*
* @param int $level
*/
public function setDebugLevel($level = 0)
{
$this->do_debug = $level;
}
/**
* Get debug output level.
*
* @return int
*/
public function getDebugLevel()
{
return $this->do_debug;
}
/**
* Set SMTP timeout.
*
* @param int $timeout The timeout duration in seconds
*/
public function setTimeout($timeout = 0)
{
$this->Timeout = $timeout;
}
/**
* Get SMTP timeout.
*
* @return int
*/
public function getTimeout()
{
return $this->Timeout;
}
/**
* Reports an error number and string.
*
* @param int $errno The error number returned by PHP
* @param string $errmsg The error message returned by PHP
* @param string $errfile The file the error occurred in
* @param int $errline The line number the error occurred on
*/
protected function errorHandler($errno, $errmsg, $errfile = '', $errline = 0)
{
$notice = 'Connection failed.';
$this->setError(
$notice,
$errmsg,
(string) $errno
);
$this->edebug(
"$notice Error #$errno: $errmsg [$errfile line $errline]",
self::DEBUG_CONNECTION
);
}
/**
* Extract and return the ID of the last SMTP transaction based on
* a list of patterns provided in SMTP::$smtp_transaction_id_patterns.
* Relies on the host providing the ID in response to a DATA command.
* If no reply has been received yet, it will return null.
* If no pattern was matched, it will return false.
*
* @return bool|string|null
*/
protected function recordLastTransactionID()
{
$reply = $this->getLastReply();
if (empty($reply)) {
$this->last_smtp_transaction_id = null;
} else {
$this->last_smtp_transaction_id = false;
foreach ($this->smtp_transaction_id_patterns as $smtp_transaction_id_pattern) {
$matches = [];
if (preg_match($smtp_transaction_id_pattern, $reply, $matches)) {
$this->last_smtp_transaction_id = trim($matches[1]);
break;
}
}
}
return $this->last_smtp_transaction_id;
}
/**
* Get the queue/transaction ID of the last SMTP transaction
* If no reply has been received yet, it will return null.
* If no pattern was matched, it will return false.
*
* @return bool|string|null
*
* @see recordLastTransactionID()
*/
public function getLastTransactionID()
{
return $this->last_smtp_transaction_id;
}
}
PHPMailer.php 0000666 00000534222 15046664057 0007067 0 ustar 00
* @author Jim Jagielski (jimjag)
* @author Andy Prevost (codeworxtech)
* @author Brent R. Matzelle (original founder)
* @copyright 2012 - 2020 Marcus Bointon
* @copyright 2010 - 2012 Jim Jagielski
* @copyright 2004 - 2009 Andy Prevost
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
* @note This program is distributed in the hope that it will be useful - WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*/
namespace PHPMailer\PHPMailer;
/**
* PHPMailer - PHP email creation and transport class.
*
* @author Marcus Bointon (Synchro/coolbru)
* @author Jim Jagielski (jimjag)
* @author Andy Prevost (codeworxtech)
* @author Brent R. Matzelle (original founder)
*/
class PHPMailer
{
const CHARSET_ASCII = 'us-ascii';
const CHARSET_ISO88591 = 'iso-8859-1';
const CHARSET_UTF8 = 'utf-8';
const CONTENT_TYPE_PLAINTEXT = 'text/plain';
const CONTENT_TYPE_TEXT_CALENDAR = 'text/calendar';
const CONTENT_TYPE_TEXT_HTML = 'text/html';
const CONTENT_TYPE_MULTIPART_ALTERNATIVE = 'multipart/alternative';
const CONTENT_TYPE_MULTIPART_MIXED = 'multipart/mixed';
const CONTENT_TYPE_MULTIPART_RELATED = 'multipart/related';
const ENCODING_7BIT = '7bit';
const ENCODING_8BIT = '8bit';
const ENCODING_BASE64 = 'base64';
const ENCODING_BINARY = 'binary';
const ENCODING_QUOTED_PRINTABLE = 'quoted-printable';
const ENCRYPTION_STARTTLS = 'tls';
const ENCRYPTION_SMTPS = 'ssl';
const ICAL_METHOD_REQUEST = 'REQUEST';
const ICAL_METHOD_PUBLISH = 'PUBLISH';
const ICAL_METHOD_REPLY = 'REPLY';
const ICAL_METHOD_ADD = 'ADD';
const ICAL_METHOD_CANCEL = 'CANCEL';
const ICAL_METHOD_REFRESH = 'REFRESH';
const ICAL_METHOD_COUNTER = 'COUNTER';
const ICAL_METHOD_DECLINECOUNTER = 'DECLINECOUNTER';
/**
* Email priority.
* Options: null (default), 1 = High, 3 = Normal, 5 = low.
* When null, the header is not set at all.
*
* @var int|null
*/
public $Priority;
/**
* The character set of the message.
*
* @var string
*/
public $CharSet = self::CHARSET_ISO88591;
/**
* The MIME Content-type of the message.
*
* @var string
*/
public $ContentType = self::CONTENT_TYPE_PLAINTEXT;
/**
* The message encoding.
* Options: "8bit", "7bit", "binary", "base64", and "quoted-printable".
*
* @var string
*/
public $Encoding = self::ENCODING_8BIT;
/**
* Holds the most recent mailer error message.
*
* @var string
*/
public $ErrorInfo = '';
/**
* The From email address for the message.
*
* @var string
*/
public $From = '';
/**
* The From name of the message.
*
* @var string
*/
public $FromName = '';
/**
* The envelope sender of the message.
* This will usually be turned into a Return-Path header by the receiver,
* and is the address that bounces will be sent to.
* If not empty, will be passed via `-f` to sendmail or as the 'MAIL FROM' value over SMTP.
*
* @var string
*/
public $Sender = '';
/**
* The Subject of the message.
*
* @var string
*/
public $Subject = '';
/**
* An HTML or plain text message body.
* If HTML then call isHTML(true).
*
* @var string
*/
public $Body = '';
/**
* The plain-text message body.
* This body can be read by mail clients that do not have HTML email
* capability such as mutt & Eudora.
* Clients that can read HTML will view the normal Body.
*
* @var string
*/
public $AltBody = '';
/**
* An iCal message part body.
* Only supported in simple alt or alt_inline message types
* To generate iCal event structures, use classes like EasyPeasyICS or iCalcreator.
*
* @see http://sprain.ch/blog/downloads/php-class-easypeasyics-create-ical-files-with-php/
* @see http://kigkonsult.se/iCalcreator/
*
* @var string
*/
public $Ical = '';
/**
* Value-array of "method" in Contenttype header "text/calendar"
*
* @var string[]
*/
protected static $IcalMethods = [
self::ICAL_METHOD_REQUEST,
self::ICAL_METHOD_PUBLISH,
self::ICAL_METHOD_REPLY,
self::ICAL_METHOD_ADD,
self::ICAL_METHOD_CANCEL,
self::ICAL_METHOD_REFRESH,
self::ICAL_METHOD_COUNTER,
self::ICAL_METHOD_DECLINECOUNTER,
];
/**
* The complete compiled MIME message body.
*
* @var string
*/
protected $MIMEBody = '';
/**
* The complete compiled MIME message headers.
*
* @var string
*/
protected $MIMEHeader = '';
/**
* Extra headers that createHeader() doesn't fold in.
*
* @var string
*/
protected $mailHeader = '';
/**
* Word-wrap the message body to this number of chars.
* Set to 0 to not wrap. A useful value here is 78, for RFC2822 section 2.1.1 compliance.
*
* @see static::STD_LINE_LENGTH
*
* @var int
*/
public $WordWrap = 0;
/**
* Which method to use to send mail.
* Options: "mail", "sendmail", or "smtp".
*
* @var string
*/
public $Mailer = 'mail';
/**
* The path to the sendmail program.
*
* @var string
*/
public $Sendmail = '/usr/sbin/sendmail';
/**
* Whether mail() uses a fully sendmail-compatible MTA.
* One which supports sendmail's "-oi -f" options.
*
* @var bool
*/
public $UseSendmailOptions = true;
/**
* The email address that a reading confirmation should be sent to, also known as read receipt.
*
* @var string
*/
public $ConfirmReadingTo = '';
/**
* The hostname to use in the Message-ID header and as default HELO string.
* If empty, PHPMailer attempts to find one with, in order,
* $_SERVER['SERVER_NAME'], gethostname(), php_uname('n'), or the value
* 'localhost.localdomain'.
*
* @see PHPMailer::$Helo
*
* @var string
*/
public $Hostname = '';
/**
* An ID to be used in the Message-ID header.
* If empty, a unique id will be generated.
* You can set your own, but it must be in the format "",
* as defined in RFC5322 section 3.6.4 or it will be ignored.
*
* @see https://tools.ietf.org/html/rfc5322#section-3.6.4
*
* @var string
*/
public $MessageID = '';
/**
* The message Date to be used in the Date header.
* If empty, the current date will be added.
*
* @var string
*/
public $MessageDate = '';
/**
* SMTP hosts.
* Either a single hostname or multiple semicolon-delimited hostnames.
* You can also specify a different port
* for each host by using this format: [hostname:port]
* (e.g. "smtp1.example.com:25;smtp2.example.com").
* You can also specify encryption type, for example:
* (e.g. "tls://smtp1.example.com:587;ssl://smtp2.example.com:465").
* Hosts will be tried in order.
*
* @var string
*/
public $Host = 'localhost';
/**
* The default SMTP server port.
*
* @var int
*/
public $Port = 25;
/**
* The SMTP HELO/EHLO name used for the SMTP connection.
* Default is $Hostname. If $Hostname is empty, PHPMailer attempts to find
* one with the same method described above for $Hostname.
*
* @see PHPMailer::$Hostname
*
* @var string
*/
public $Helo = '';
/**
* What kind of encryption to use on the SMTP connection.
* Options: '', static::ENCRYPTION_STARTTLS, or static::ENCRYPTION_SMTPS.
*
* @var string
*/
public $SMTPSecure = '';
/**
* Whether to enable TLS encryption automatically if a server supports it,
* even if `SMTPSecure` is not set to 'tls'.
* Be aware that in PHP >= 5.6 this requires that the server's certificates are valid.
*
* @var bool
*/
public $SMTPAutoTLS = true;
/**
* Whether to use SMTP authentication.
* Uses the Username and Password properties.
*
* @see PHPMailer::$Username
* @see PHPMailer::$Password
*
* @var bool
*/
public $SMTPAuth = false;
/**
* Options array passed to stream_context_create when connecting via SMTP.
*
* @var array
*/
public $SMTPOptions = [];
/**
* SMTP username.
*
* @var string
*/
public $Username = '';
/**
* SMTP password.
*
* @var string
*/
public $Password = '';
/**
* SMTP authentication type. Options are CRAM-MD5, LOGIN, PLAIN, XOAUTH2.
* If not specified, the first one from that list that the server supports will be selected.
*
* @var string
*/
public $AuthType = '';
/**
* An implementation of the PHPMailer OAuthTokenProvider interface.
*
* @var OAuthTokenProvider
*/
protected $oauth;
/**
* The SMTP server timeout in seconds.
* Default of 5 minutes (300sec) is from RFC2821 section 4.5.3.2.
*
* @var int
*/
public $Timeout = 300;
/**
* Comma separated list of DSN notifications
* 'NEVER' under no circumstances a DSN must be returned to the sender.
* If you use NEVER all other notifications will be ignored.
* 'SUCCESS' will notify you when your mail has arrived at its destination.
* 'FAILURE' will arrive if an error occurred during delivery.
* 'DELAY' will notify you if there is an unusual delay in delivery, but the actual
* delivery's outcome (success or failure) is not yet decided.
*
* @see https://tools.ietf.org/html/rfc3461 See section 4.1 for more information about NOTIFY
*/
public $dsn = '';
/**
* SMTP class debug output mode.
* Debug output level.
* Options:
* @see SMTP::DEBUG_OFF: No output
* @see SMTP::DEBUG_CLIENT: Client messages
* @see SMTP::DEBUG_SERVER: Client and server messages
* @see SMTP::DEBUG_CONNECTION: As SERVER plus connection status
* @see SMTP::DEBUG_LOWLEVEL: Noisy, low-level data output, rarely needed
*
* @see SMTP::$do_debug
*
* @var int
*/
public $SMTPDebug = 0;
/**
* How to handle debug output.
* Options:
* * `echo` Output plain-text as-is, appropriate for CLI
* * `html` Output escaped, line breaks converted to `
`, appropriate for browser output
* * `error_log` Output to error log as configured in php.ini
* By default PHPMailer will use `echo` if run from a `cli` or `cli-server` SAPI, `html` otherwise.
* Alternatively, you can provide a callable expecting two params: a message string and the debug level:
*
* ```php
* $mail->Debugoutput = function($str, $level) {echo "debug level $level; message: $str";};
* ```
*
* Alternatively, you can pass in an instance of a PSR-3 compatible logger, though only `debug`
* level output is used:
*
* ```php
* $mail->Debugoutput = new myPsr3Logger;
* ```
*
* @see SMTP::$Debugoutput
*
* @var string|callable|\Psr\Log\LoggerInterface
*/
public $Debugoutput = 'echo';
/**
* Whether to keep the SMTP connection open after each message.
* If this is set to true then the connection will remain open after a send,
* and closing the connection will require an explicit call to smtpClose().
* It's a good idea to use this if you are sending multiple messages as it reduces overhead.
* See the mailing list example for how to use it.
*
* @var bool
*/
public $SMTPKeepAlive = false;
/**
* Whether to split multiple to addresses into multiple messages
* or send them all in one message.
* Only supported in `mail` and `sendmail` transports, not in SMTP.
*
* @var bool
*
* @deprecated 6.0.0 PHPMailer isn't a mailing list manager!
*/
public $SingleTo = false;
/**
* Storage for addresses when SingleTo is enabled.
*
* @var array
*/
protected $SingleToArray = [];
/**
* Whether to generate VERP addresses on send.
* Only applicable when sending via SMTP.
*
* @see https://en.wikipedia.org/wiki/Variable_envelope_return_path
* @see http://www.postfix.org/VERP_README.html Postfix VERP info
*
* @var bool
*/
public $do_verp = false;
/**
* Whether to allow sending messages with an empty body.
*
* @var bool
*/
public $AllowEmpty = false;
/**
* DKIM selector.
*
* @var string
*/
public $DKIM_selector = '';
/**
* DKIM Identity.
* Usually the email address used as the source of the email.
*
* @var string
*/
public $DKIM_identity = '';
/**
* DKIM passphrase.
* Used if your key is encrypted.
*
* @var string
*/
public $DKIM_passphrase = '';
/**
* DKIM signing domain name.
*
* @example 'example.com'
*
* @var string
*/
public $DKIM_domain = '';
/**
* DKIM Copy header field values for diagnostic use.
*
* @var bool
*/
public $DKIM_copyHeaderFields = true;
/**
* DKIM Extra signing headers.
*
* @example ['List-Unsubscribe', 'List-Help']
*
* @var array
*/
public $DKIM_extraHeaders = [];
/**
* DKIM private key file path.
*
* @var string
*/
public $DKIM_private = '';
/**
* DKIM private key string.
*
* If set, takes precedence over `$DKIM_private`.
*
* @var string
*/
public $DKIM_private_string = '';
/**
* Callback Action function name.
*
* The function that handles the result of the send email action.
* It is called out by send() for each email sent.
*
* Value can be any php callable: http://www.php.net/is_callable
*
* Parameters:
* bool $result result of the send action
* array $to email addresses of the recipients
* array $cc cc email addresses
* array $bcc bcc email addresses
* string $subject the subject
* string $body the email body
* string $from email address of sender
* string $extra extra information of possible use
* "smtp_transaction_id' => last smtp transaction id
*
* @var string
*/
public $action_function = '';
/**
* What to put in the X-Mailer header.
* Options: An empty string for PHPMailer default, whitespace/null for none, or a string to use.
*
* @var string|null
*/
public $XMailer = '';
/**
* Which validator to use by default when validating email addresses.
* May be a callable to inject your own validator, but there are several built-in validators.
* The default validator uses PHP's FILTER_VALIDATE_EMAIL filter_var option.
*
* @see PHPMailer::validateAddress()
*
* @var string|callable
*/
public static $validator = 'php';
/**
* An instance of the SMTP sender class.
*
* @var SMTP
*/
protected $smtp;
/**
* The array of 'to' names and addresses.
*
* @var array
*/
protected $to = [];
/**
* The array of 'cc' names and addresses.
*
* @var array
*/
protected $cc = [];
/**
* The array of 'bcc' names and addresses.
*
* @var array
*/
protected $bcc = [];
/**
* The array of reply-to names and addresses.
*
* @var array
*/
protected $ReplyTo = [];
/**
* An array of all kinds of addresses.
* Includes all of $to, $cc, $bcc.
*
* @see PHPMailer::$to
* @see PHPMailer::$cc
* @see PHPMailer::$bcc
*
* @var array
*/
protected $all_recipients = [];
/**
* An array of names and addresses queued for validation.
* In send(), valid and non duplicate entries are moved to $all_recipients
* and one of $to, $cc, or $bcc.
* This array is used only for addresses with IDN.
*
* @see PHPMailer::$to
* @see PHPMailer::$cc
* @see PHPMailer::$bcc
* @see PHPMailer::$all_recipients
*
* @var array
*/
protected $RecipientsQueue = [];
/**
* An array of reply-to names and addresses queued for validation.
* In send(), valid and non duplicate entries are moved to $ReplyTo.
* This array is used only for addresses with IDN.
*
* @see PHPMailer::$ReplyTo
*
* @var array
*/
protected $ReplyToQueue = [];
/**
* The array of attachments.
*
* @var array
*/
protected $attachment = [];
/**
* The array of custom headers.
*
* @var array
*/
protected $CustomHeader = [];
/**
* The most recent Message-ID (including angular brackets).
*
* @var string
*/
protected $lastMessageID = '';
/**
* The message's MIME type.
*
* @var string
*/
protected $message_type = '';
/**
* The array of MIME boundary strings.
*
* @var array
*/
protected $boundary = [];
/**
* The array of available text strings for the current language.
*
* @var array
*/
protected $language = [];
/**
* The number of errors encountered.
*
* @var int
*/
protected $error_count = 0;
/**
* The S/MIME certificate file path.
*
* @var string
*/
protected $sign_cert_file = '';
/**
* The S/MIME key file path.
*
* @var string
*/
protected $sign_key_file = '';
/**
* The optional S/MIME extra certificates ("CA Chain") file path.
*
* @var string
*/
protected $sign_extracerts_file = '';
/**
* The S/MIME password for the key.
* Used only if the key is encrypted.
*
* @var string
*/
protected $sign_key_pass = '';
/**
* Whether to throw exceptions for errors.
*
* @var bool
*/
protected $exceptions = false;
/**
* Unique ID used for message ID and boundaries.
*
* @var string
*/
protected $uniqueid = '';
/**
* The PHPMailer Version number.
*
* @var string
*/
const VERSION = '6.6.4';
/**
* Error severity: message only, continue processing.
*
* @var int
*/
const STOP_MESSAGE = 0;
/**
* Error severity: message, likely ok to continue processing.
*
* @var int
*/
const STOP_CONTINUE = 1;
/**
* Error severity: message, plus full stop, critical error reached.
*
* @var int
*/
const STOP_CRITICAL = 2;
/**
* The SMTP standard CRLF line break.
* If you want to change line break format, change static::$LE, not this.
*/
const CRLF = "\r\n";
/**
* "Folding White Space" a white space string used for line folding.
*/
const FWS = ' ';
/**
* SMTP RFC standard line ending; Carriage Return, Line Feed.
*
* @var string
*/
protected static $LE = self::CRLF;
/**
* The maximum line length supported by mail().
*
* Background: mail() will sometimes corrupt messages
* with headers headers longer than 65 chars, see #818.
*
* @var int
*/
const MAIL_MAX_LINE_LENGTH = 63;
/**
* The maximum line length allowed by RFC 2822 section 2.1.1.
*
* @var int
*/
const MAX_LINE_LENGTH = 998;
/**
* The lower maximum line length allowed by RFC 2822 section 2.1.1.
* This length does NOT include the line break
* 76 means that lines will be 77 or 78 chars depending on whether
* the line break format is LF or CRLF; both are valid.
*
* @var int
*/
const STD_LINE_LENGTH = 76;
/**
* Constructor.
*
* @param bool $exceptions Should we throw external exceptions?
*/
public function __construct($exceptions = null)
{
if (null !== $exceptions) {
$this->exceptions = (bool) $exceptions;
}
//Pick an appropriate debug output format automatically
$this->Debugoutput = (strpos(PHP_SAPI, 'cli') !== false ? 'echo' : 'html');
}
/**
* Destructor.
*/
public function __destruct()
{
//Close any open SMTP connection nicely
$this->smtpClose();
}
/**
* Call mail() in a safe_mode-aware fashion.
* Also, unless sendmail_path points to sendmail (or something that
* claims to be sendmail), don't pass params (not a perfect fix,
* but it will do).
*
* @param string $to To
* @param string $subject Subject
* @param string $body Message Body
* @param string $header Additional Header(s)
* @param string|null $params Params
*
* @return bool
*/
private function mailPassthru($to, $subject, $body, $header, $params)
{
//Check overloading of mail function to avoid double-encoding
if (ini_get('mbstring.func_overload') & 1) {
$subject = $this->secureHeader($subject);
} else {
$subject = $this->encodeHeader($this->secureHeader($subject));
}
//Calling mail() with null params breaks
$this->edebug('Sending with mail()');
$this->edebug('Sendmail path: ' . ini_get('sendmail_path'));
$this->edebug("Envelope sender: {$this->Sender}");
$this->edebug("To: {$to}");
$this->edebug("Subject: {$subject}");
$this->edebug("Headers: {$header}");
if (!$this->UseSendmailOptions || null === $params) {
$result = @mail($to, $subject, $body, $header);
} else {
$this->edebug("Additional params: {$params}");
$result = @mail($to, $subject, $body, $header, $params);
}
$this->edebug('Result: ' . ($result ? 'true' : 'false'));
return $result;
}
/**
* Output debugging info via a user-defined method.
* Only generates output if debug output is enabled.
*
* @see PHPMailer::$Debugoutput
* @see PHPMailer::$SMTPDebug
*
* @param string $str
*/
protected function edebug($str)
{
if ($this->SMTPDebug <= 0) {
return;
}
//Is this a PSR-3 logger?
if ($this->Debugoutput instanceof \Psr\Log\LoggerInterface) {
$this->Debugoutput->debug($str);
return;
}
//Avoid clash with built-in function names
if (is_callable($this->Debugoutput) && !in_array($this->Debugoutput, ['error_log', 'html', 'echo'])) {
call_user_func($this->Debugoutput, $str, $this->SMTPDebug);
return;
}
switch ($this->Debugoutput) {
case 'error_log':
//Don't output, just log
/** @noinspection ForgottenDebugOutputInspection */
error_log($str);
break;
case 'html':
//Cleans up output a bit for a better looking, HTML-safe output
echo htmlentities(
preg_replace('/[\r\n]+/', '', $str),
ENT_QUOTES,
'UTF-8'
), "
\n";
break;
case 'echo':
default:
//Normalize line breaks
$str = preg_replace('/\r\n|\r/m', "\n", $str);
echo gmdate('Y-m-d H:i:s'),
"\t",
//Trim trailing space
trim(
//Indent for readability, except for trailing break
str_replace(
"\n",
"\n \t ",
trim($str)
)
),
"\n";
}
}
/**
* Sets message type to HTML or plain.
*
* @param bool $isHtml True for HTML mode
*/
public function isHTML($isHtml = true)
{
if ($isHtml) {
$this->ContentType = static::CONTENT_TYPE_TEXT_HTML;
} else {
$this->ContentType = static::CONTENT_TYPE_PLAINTEXT;
}
}
/**
* Send messages using SMTP.
*/
public function isSMTP()
{
$this->Mailer = 'smtp';
}
/**
* Send messages using PHP's mail() function.
*/
public function isMail()
{
$this->Mailer = 'mail';
}
/**
* Send messages using $Sendmail.
*/
public function isSendmail()
{
$ini_sendmail_path = ini_get('sendmail_path');
if (false === stripos($ini_sendmail_path, 'sendmail')) {
$this->Sendmail = '/usr/sbin/sendmail';
} else {
$this->Sendmail = $ini_sendmail_path;
}
$this->Mailer = 'sendmail';
}
/**
* Send messages using qmail.
*/
public function isQmail()
{
$ini_sendmail_path = ini_get('sendmail_path');
if (false === stripos($ini_sendmail_path, 'qmail')) {
$this->Sendmail = '/var/qmail/bin/qmail-inject';
} else {
$this->Sendmail = $ini_sendmail_path;
}
$this->Mailer = 'qmail';
}
/**
* Add a "To" address.
*
* @param string $address The email address to send to
* @param string $name
*
* @throws Exception
*
* @return bool true on success, false if address already used or invalid in some way
*/
public function addAddress($address, $name = '')
{
return $this->addOrEnqueueAnAddress('to', $address, $name);
}
/**
* Add a "CC" address.
*
* @param string $address The email address to send to
* @param string $name
*
* @throws Exception
*
* @return bool true on success, false if address already used or invalid in some way
*/
public function addCC($address, $name = '')
{
return $this->addOrEnqueueAnAddress('cc', $address, $name);
}
/**
* Add a "BCC" address.
*
* @param string $address The email address to send to
* @param string $name
*
* @throws Exception
*
* @return bool true on success, false if address already used or invalid in some way
*/
public function addBCC($address, $name = '')
{
return $this->addOrEnqueueAnAddress('bcc', $address, $name);
}
/**
* Add a "Reply-To" address.
*
* @param string $address The email address to reply to
* @param string $name
*
* @throws Exception
*
* @return bool true on success, false if address already used or invalid in some way
*/
public function addReplyTo($address, $name = '')
{
return $this->addOrEnqueueAnAddress('Reply-To', $address, $name);
}
/**
* Add an address to one of the recipient arrays or to the ReplyTo array. Because PHPMailer
* can't validate addresses with an IDN without knowing the PHPMailer::$CharSet (that can still
* be modified after calling this function), addition of such addresses is delayed until send().
* Addresses that have been added already return false, but do not throw exceptions.
*
* @param string $kind One of 'to', 'cc', 'bcc', or 'ReplyTo'
* @param string $address The email address
* @param string $name An optional username associated with the address
*
* @throws Exception
*
* @return bool true on success, false if address already used or invalid in some way
*/
protected function addOrEnqueueAnAddress($kind, $address, $name)
{
$pos = false;
if ($address !== null) {
$address = trim($address);
$pos = strrpos($address, '@');
}
if (false === $pos) {
//At-sign is missing.
$error_message = sprintf(
'%s (%s): %s',
$this->lang('invalid_address'),
$kind,
$address
);
$this->setError($error_message);
$this->edebug($error_message);
if ($this->exceptions) {
throw new Exception($error_message);
}
return false;
}
if ($name !== null && is_string($name)) {
$name = trim(preg_replace('/[\r\n]+/', '', $name)); //Strip breaks and trim
} else {
$name = '';
}
$params = [$kind, $address, $name];
//Enqueue addresses with IDN until we know the PHPMailer::$CharSet.
//Domain is assumed to be whatever is after the last @ symbol in the address
if (static::idnSupported() && $this->has8bitChars(substr($address, ++$pos))) {
if ('Reply-To' !== $kind) {
if (!array_key_exists($address, $this->RecipientsQueue)) {
$this->RecipientsQueue[$address] = $params;
return true;
}
} elseif (!array_key_exists($address, $this->ReplyToQueue)) {
$this->ReplyToQueue[$address] = $params;
return true;
}
return false;
}
//Immediately add standard addresses without IDN.
return call_user_func_array([$this, 'addAnAddress'], $params);
}
/**
* Add an address to one of the recipient arrays or to the ReplyTo array.
* Addresses that have been added already return false, but do not throw exceptions.
*
* @param string $kind One of 'to', 'cc', 'bcc', or 'ReplyTo'
* @param string $address The email address to send, resp. to reply to
* @param string $name
*
* @throws Exception
*
* @return bool true on success, false if address already used or invalid in some way
*/
protected function addAnAddress($kind, $address, $name = '')
{
if (!in_array($kind, ['to', 'cc', 'bcc', 'Reply-To'])) {
$error_message = sprintf(
'%s: %s',
$this->lang('Invalid recipient kind'),
$kind
);
$this->setError($error_message);
$this->edebug($error_message);
if ($this->exceptions) {
throw new Exception($error_message);
}
return false;
}
if (!static::validateAddress($address)) {
$error_message = sprintf(
'%s (%s): %s',
$this->lang('invalid_address'),
$kind,
$address
);
$this->setError($error_message);
$this->edebug($error_message);
if ($this->exceptions) {
throw new Exception($error_message);
}
return false;
}
if ('Reply-To' !== $kind) {
if (!array_key_exists(strtolower($address), $this->all_recipients)) {
$this->{$kind}[] = [$address, $name];
$this->all_recipients[strtolower($address)] = true;
return true;
}
} elseif (!array_key_exists(strtolower($address), $this->ReplyTo)) {
$this->ReplyTo[strtolower($address)] = [$address, $name];
return true;
}
return false;
}
/**
* Parse and validate a string containing one or more RFC822-style comma-separated email addresses
* of the form "display name " into an array of name/address pairs.
* Uses the imap_rfc822_parse_adrlist function if the IMAP extension is available.
* Note that quotes in the name part are removed.
*
* @see http://www.andrew.cmu.edu/user/agreen1/testing/mrbs/web/Mail/RFC822.php A more careful implementation
*
* @param string $addrstr The address list string
* @param bool $useimap Whether to use the IMAP extension to parse the list
* @param string $charset The charset to use when decoding the address list string.
*
* @return array
*/
public static function parseAddresses($addrstr, $useimap = true, $charset = self::CHARSET_ISO88591)
{
$addresses = [];
if ($useimap && function_exists('imap_rfc822_parse_adrlist')) {
//Use this built-in parser if it's available
$list = imap_rfc822_parse_adrlist($addrstr, '');
// Clear any potential IMAP errors to get rid of notices being thrown at end of script.
imap_errors();
foreach ($list as $address) {
if (
'.SYNTAX-ERROR.' !== $address->host &&
static::validateAddress($address->mailbox . '@' . $address->host)
) {
//Decode the name part if it's present and encoded
if (
property_exists($address, 'personal') &&
//Check for a Mbstring constant rather than using extension_loaded, which is sometimes disabled
defined('MB_CASE_UPPER') &&
preg_match('/^=\?.*\?=$/s', $address->personal)
) {
$origCharset = mb_internal_encoding();
mb_internal_encoding($charset);
//Undo any RFC2047-encoded spaces-as-underscores
$address->personal = str_replace('_', '=20', $address->personal);
//Decode the name
$address->personal = mb_decode_mimeheader($address->personal);
mb_internal_encoding($origCharset);
}
$addresses[] = [
'name' => (property_exists($address, 'personal') ? $address->personal : ''),
'address' => $address->mailbox . '@' . $address->host,
];
}
}
} else {
//Use this simpler parser
$list = explode(',', $addrstr);
foreach ($list as $address) {
$address = trim($address);
//Is there a separate name part?
if (strpos($address, '<') === false) {
//No separate name, just use the whole thing
if (static::validateAddress($address)) {
$addresses[] = [
'name' => '',
'address' => $address,
];
}
} else {
list($name, $email) = explode('<', $address);
$email = trim(str_replace('>', '', $email));
$name = trim($name);
if (static::validateAddress($email)) {
//Check for a Mbstring constant rather than using extension_loaded, which is sometimes disabled
//If this name is encoded, decode it
if (defined('MB_CASE_UPPER') && preg_match('/^=\?.*\?=$/s', $name)) {
$origCharset = mb_internal_encoding();
mb_internal_encoding($charset);
//Undo any RFC2047-encoded spaces-as-underscores
$name = str_replace('_', '=20', $name);
//Decode the name
$name = mb_decode_mimeheader($name);
mb_internal_encoding($origCharset);
}
$addresses[] = [
//Remove any surrounding quotes and spaces from the name
'name' => trim($name, '\'" '),
'address' => $email,
];
}
}
}
}
return $addresses;
}
/**
* Set the From and FromName properties.
*
* @param string $address
* @param string $name
* @param bool $auto Whether to also set the Sender address, defaults to true
*
* @throws Exception
*
* @return bool
*/
public function setFrom($address, $name = '', $auto = true)
{
$address = trim((string)$address);
$name = trim(preg_replace('/[\r\n]+/', '', $name)); //Strip breaks and trim
//Don't validate now addresses with IDN. Will be done in send().
$pos = strrpos($address, '@');
if (
(false === $pos)
|| ((!$this->has8bitChars(substr($address, ++$pos)) || !static::idnSupported())
&& !static::validateAddress($address))
) {
$error_message = sprintf(
'%s (From): %s',
$this->lang('invalid_address'),
$address
);
$this->setError($error_message);
$this->edebug($error_message);
if ($this->exceptions) {
throw new Exception($error_message);
}
return false;
}
$this->From = $address;
$this->FromName = $name;
if ($auto && empty($this->Sender)) {
$this->Sender = $address;
}
return true;
}
/**
* Return the Message-ID header of the last email.
* Technically this is the value from the last time the headers were created,
* but it's also the message ID of the last sent message except in
* pathological cases.
*
* @return string
*/
public function getLastMessageID()
{
return $this->lastMessageID;
}
/**
* Check that a string looks like an email address.
* Validation patterns supported:
* * `auto` Pick best pattern automatically;
* * `pcre8` Use the squiloople.com pattern, requires PCRE > 8.0;
* * `pcre` Use old PCRE implementation;
* * `php` Use PHP built-in FILTER_VALIDATE_EMAIL;
* * `html5` Use the pattern given by the HTML5 spec for 'email' type form input elements.
* * `noregex` Don't use a regex: super fast, really dumb.
* Alternatively you may pass in a callable to inject your own validator, for example:
*
* ```php
* PHPMailer::validateAddress('user@example.com', function($address) {
* return (strpos($address, '@') !== false);
* });
* ```
*
* You can also set the PHPMailer::$validator static to a callable, allowing built-in methods to use your validator.
*
* @param string $address The email address to check
* @param string|callable $patternselect Which pattern to use
*
* @return bool
*/
public static function validateAddress($address, $patternselect = null)
{
if (null === $patternselect) {
$patternselect = static::$validator;
}
//Don't allow strings as callables, see SECURITY.md and CVE-2021-3603
if (is_callable($patternselect) && !is_string($patternselect)) {
return call_user_func($patternselect, $address);
}
//Reject line breaks in addresses; it's valid RFC5322, but not RFC5321
if (strpos($address, "\n") !== false || strpos($address, "\r") !== false) {
return false;
}
switch ($patternselect) {
case 'pcre': //Kept for BC
case 'pcre8':
/*
* A more complex and more permissive version of the RFC5322 regex on which FILTER_VALIDATE_EMAIL
* is based.
* In addition to the addresses allowed by filter_var, also permits:
* * dotless domains: `a@b`
* * comments: `1234 @ local(blah) .machine .example`
* * quoted elements: `'"test blah"@example.org'`
* * numeric TLDs: `a@b.123`
* * unbracketed IPv4 literals: `a@192.168.0.1`
* * IPv6 literals: 'first.last@[IPv6:a1::]'
* Not all of these will necessarily work for sending!
*
* @see http://squiloople.com/2009/12/20/email-address-validation/
* @copyright 2009-2010 Michael Rushton
* Feel free to use and redistribute this code. But please keep this copyright notice.
*/
return (bool) preg_match(
'/^(?!(?>(?1)"?(?>\\\[ -~]|[^"])"?(?1)){255,})(?!(?>(?1)"?(?>\\\[ -~]|[^"])"?(?1)){65,}@)' .
'((?>(?>(?>((?>(?>(?>\x0D\x0A)?[\t ])+|(?>[\t ]*\x0D\x0A)?[\t ]+)?)(\((?>(?2)' .
'(?>[\x01-\x08\x0B\x0C\x0E-\'*-\[\]-\x7F]|\\\[\x00-\x7F]|(?3)))*(?2)\)))+(?2))|(?2))?)' .
'([!#-\'*+\/-9=?^-~-]+|"(?>(?2)(?>[\x01-\x08\x0B\x0C\x0E-!#-\[\]-\x7F]|\\\[\x00-\x7F]))*' .
'(?2)")(?>(?1)\.(?1)(?4))*(?1)@(?!(?1)[a-z0-9-]{64,})(?1)(?>([a-z0-9](?>[a-z0-9-]*[a-z0-9])?)' .
'(?>(?1)\.(?!(?1)[a-z0-9-]{64,})(?1)(?5)){0,126}|\[(?:(?>IPv6:(?>([a-f0-9]{1,4})(?>:(?6)){7}' .
'|(?!(?:.*[a-f0-9][:\]]){8,})((?6)(?>:(?6)){0,6})?::(?7)?))|(?>(?>IPv6:(?>(?6)(?>:(?6)){5}:' .
'|(?!(?:.*[a-f0-9]:){6,})(?8)?::(?>((?6)(?>:(?6)){0,4}):)?))?(25[0-5]|2[0-4][0-9]|1[0-9]{2}' .
'|[1-9]?[0-9])(?>\.(?9)){3}))\])(?1)$/isD',
$address
);
case 'html5':
/*
* This is the pattern used in the HTML5 spec for validation of 'email' type form input elements.
*
* @see https://html.spec.whatwg.org/#e-mail-state-(type=email)
*/
return (bool) preg_match(
'/^[a-zA-Z0-9.!#$%&\'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}' .
'[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/sD',
$address
);
case 'php':
default:
return filter_var($address, FILTER_VALIDATE_EMAIL) !== false;
}
}
/**
* Tells whether IDNs (Internationalized Domain Names) are supported or not. This requires the
* `intl` and `mbstring` PHP extensions.
*
* @return bool `true` if required functions for IDN support are present
*/
public static function idnSupported()
{
return function_exists('idn_to_ascii') && function_exists('mb_convert_encoding');
}
/**
* Converts IDN in given email address to its ASCII form, also known as punycode, if possible.
* Important: Address must be passed in same encoding as currently set in PHPMailer::$CharSet.
* This function silently returns unmodified address if:
* - No conversion is necessary (i.e. domain name is not an IDN, or is already in ASCII form)
* - Conversion to punycode is impossible (e.g. required PHP functions are not available)
* or fails for any reason (e.g. domain contains characters not allowed in an IDN).
*
* @see PHPMailer::$CharSet
*
* @param string $address The email address to convert
*
* @return string The encoded address in ASCII form
*/
public function punyencodeAddress($address)
{
//Verify we have required functions, CharSet, and at-sign.
$pos = strrpos($address, '@');
if (
!empty($this->CharSet) &&
false !== $pos &&
static::idnSupported()
) {
$domain = substr($address, ++$pos);
//Verify CharSet string is a valid one, and domain properly encoded in this CharSet.
if ($this->has8bitChars($domain) && @mb_check_encoding($domain, $this->CharSet)) {
//Convert the domain from whatever charset it's in to UTF-8
$domain = mb_convert_encoding($domain, self::CHARSET_UTF8, $this->CharSet);
//Ignore IDE complaints about this line - method signature changed in PHP 5.4
$errorcode = 0;
if (defined('INTL_IDNA_VARIANT_UTS46')) {
//Use the current punycode standard (appeared in PHP 7.2)
$punycode = idn_to_ascii(
$domain,
\IDNA_DEFAULT | \IDNA_USE_STD3_RULES | \IDNA_CHECK_BIDI |
\IDNA_CHECK_CONTEXTJ | \IDNA_NONTRANSITIONAL_TO_ASCII,
\INTL_IDNA_VARIANT_UTS46
);
} elseif (defined('INTL_IDNA_VARIANT_2003')) {
//Fall back to this old, deprecated/removed encoding
$punycode = idn_to_ascii($domain, $errorcode, \INTL_IDNA_VARIANT_2003);
} else {
//Fall back to a default we don't know about
$punycode = idn_to_ascii($domain, $errorcode);
}
if (false !== $punycode) {
return substr($address, 0, $pos) . $punycode;
}
}
}
return $address;
}
/**
* Create a message and send it.
* Uses the sending method specified by $Mailer.
*
* @throws Exception
*
* @return bool false on error - See the ErrorInfo property for details of the error
*/
public function send()
{
try {
if (!$this->preSend()) {
return false;
}
return $this->postSend();
} catch (Exception $exc) {
$this->mailHeader = '';
$this->setError($exc->getMessage());
if ($this->exceptions) {
throw $exc;
}
return false;
}
}
/**
* Prepare a message for sending.
*
* @throws Exception
*
* @return bool
*/
public function preSend()
{
if (
'smtp' === $this->Mailer
|| ('mail' === $this->Mailer && (\PHP_VERSION_ID >= 80000 || stripos(PHP_OS, 'WIN') === 0))
) {
//SMTP mandates RFC-compliant line endings
//and it's also used with mail() on Windows
static::setLE(self::CRLF);
} else {
//Maintain backward compatibility with legacy Linux command line mailers
static::setLE(PHP_EOL);
}
//Check for buggy PHP versions that add a header with an incorrect line break
if (
'mail' === $this->Mailer
&& ((\PHP_VERSION_ID >= 70000 && \PHP_VERSION_ID < 70017)
|| (\PHP_VERSION_ID >= 70100 && \PHP_VERSION_ID < 70103))
&& ini_get('mail.add_x_header') === '1'
&& stripos(PHP_OS, 'WIN') === 0
) {
trigger_error($this->lang('buggy_php'), E_USER_WARNING);
}
try {
$this->error_count = 0; //Reset errors
$this->mailHeader = '';
//Dequeue recipient and Reply-To addresses with IDN
foreach (array_merge($this->RecipientsQueue, $this->ReplyToQueue) as $params) {
$params[1] = $this->punyencodeAddress($params[1]);
call_user_func_array([$this, 'addAnAddress'], $params);
}
if (count($this->to) + count($this->cc) + count($this->bcc) < 1) {
throw new Exception($this->lang('provide_address'), self::STOP_CRITICAL);
}
//Validate From, Sender, and ConfirmReadingTo addresses
foreach (['From', 'Sender', 'ConfirmReadingTo'] as $address_kind) {
$this->{$address_kind} = trim($this->{$address_kind});
if (empty($this->{$address_kind})) {
continue;
}
$this->{$address_kind} = $this->punyencodeAddress($this->{$address_kind});
if (!static::validateAddress($this->{$address_kind})) {
$error_message = sprintf(
'%s (%s): %s',
$this->lang('invalid_address'),
$address_kind,
$this->{$address_kind}
);
$this->setError($error_message);
$this->edebug($error_message);
if ($this->exceptions) {
throw new Exception($error_message);
}
return false;
}
}
//Set whether the message is multipart/alternative
if ($this->alternativeExists()) {
$this->ContentType = static::CONTENT_TYPE_MULTIPART_ALTERNATIVE;
}
$this->setMessageType();
//Refuse to send an empty message unless we are specifically allowing it
if (!$this->AllowEmpty && empty($this->Body)) {
throw new Exception($this->lang('empty_message'), self::STOP_CRITICAL);
}
//Trim subject consistently
$this->Subject = trim($this->Subject);
//Create body before headers in case body makes changes to headers (e.g. altering transfer encoding)
$this->MIMEHeader = '';
$this->MIMEBody = $this->createBody();
//createBody may have added some headers, so retain them
$tempheaders = $this->MIMEHeader;
$this->MIMEHeader = $this->createHeader();
$this->MIMEHeader .= $tempheaders;
//To capture the complete message when using mail(), create
//an extra header list which createHeader() doesn't fold in
if ('mail' === $this->Mailer) {
if (count($this->to) > 0) {
$this->mailHeader .= $this->addrAppend('To', $this->to);
} else {
$this->mailHeader .= $this->headerLine('To', 'undisclosed-recipients:;');
}
$this->mailHeader .= $this->headerLine(
'Subject',
$this->encodeHeader($this->secureHeader($this->Subject))
);
}
//Sign with DKIM if enabled
if (
!empty($this->DKIM_domain)
&& !empty($this->DKIM_selector)
&& (!empty($this->DKIM_private_string)
|| (!empty($this->DKIM_private)
&& static::isPermittedPath($this->DKIM_private)
&& file_exists($this->DKIM_private)
)
)
) {
$header_dkim = $this->DKIM_Add(
$this->MIMEHeader . $this->mailHeader,
$this->encodeHeader($this->secureHeader($this->Subject)),
$this->MIMEBody
);
$this->MIMEHeader = static::stripTrailingWSP($this->MIMEHeader) . static::$LE .
static::normalizeBreaks($header_dkim) . static::$LE;
}
return true;
} catch (Exception $exc) {
$this->setError($exc->getMessage());
if ($this->exceptions) {
throw $exc;
}
return false;
}
}
/**
* Actually send a message via the selected mechanism.
*
* @throws Exception
*
* @return bool
*/
public function postSend()
{
try {
//Choose the mailer and send through it
switch ($this->Mailer) {
case 'sendmail':
case 'qmail':
return $this->sendmailSend($this->MIMEHeader, $this->MIMEBody);
case 'smtp':
return $this->smtpSend($this->MIMEHeader, $this->MIMEBody);
case 'mail':
return $this->mailSend($this->MIMEHeader, $this->MIMEBody);
default:
$sendMethod = $this->Mailer . 'Send';
if (method_exists($this, $sendMethod)) {
return $this->{$sendMethod}($this->MIMEHeader, $this->MIMEBody);
}
return $this->mailSend($this->MIMEHeader, $this->MIMEBody);
}
} catch (Exception $exc) {
if ($this->Mailer === 'smtp' && $this->SMTPKeepAlive == true) {
$this->smtp->reset();
}
$this->setError($exc->getMessage());
$this->edebug($exc->getMessage());
if ($this->exceptions) {
throw $exc;
}
}
return false;
}
/**
* Send mail using the $Sendmail program.
*
* @see PHPMailer::$Sendmail
*
* @param string $header The message headers
* @param string $body The message body
*
* @throws Exception
*
* @return bool
*/
protected function sendmailSend($header, $body)
{
if ($this->Mailer === 'qmail') {
$this->edebug('Sending with qmail');
} else {
$this->edebug('Sending with sendmail');
}
$header = static::stripTrailingWSP($header) . static::$LE . static::$LE;
//This sets the SMTP envelope sender which gets turned into a return-path header by the receiver
//A space after `-f` is optional, but there is a long history of its presence
//causing problems, so we don't use one
//Exim docs: http://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_exim_command_line.html
//Sendmail docs: http://www.sendmail.org/~ca/email/man/sendmail.html
//Qmail docs: http://www.qmail.org/man/man8/qmail-inject.html
//Example problem: https://www.drupal.org/node/1057954
//PHP 5.6 workaround
$sendmail_from_value = ini_get('sendmail_from');
if (empty($this->Sender) && !empty($sendmail_from_value)) {
//PHP config has a sender address we can use
$this->Sender = ini_get('sendmail_from');
}
//CVE-2016-10033, CVE-2016-10045: Don't pass -f if characters will be escaped.
if (!empty($this->Sender) && static::validateAddress($this->Sender) && self::isShellSafe($this->Sender)) {
if ($this->Mailer === 'qmail') {
$sendmailFmt = '%s -f%s';
} else {
$sendmailFmt = '%s -oi -f%s -t';
}
} else {
//allow sendmail to choose a default envelope sender. It may
//seem preferable to force it to use the From header as with
//SMTP, but that introduces new problems (see
//), and
//it has historically worked this way.
$sendmailFmt = '%s -oi -t';
}
$sendmail = sprintf($sendmailFmt, escapeshellcmd($this->Sendmail), $this->Sender);
$this->edebug('Sendmail path: ' . $this->Sendmail);
$this->edebug('Sendmail command: ' . $sendmail);
$this->edebug('Envelope sender: ' . $this->Sender);
$this->edebug("Headers: {$header}");
if ($this->SingleTo) {
foreach ($this->SingleToArray as $toAddr) {
$mail = @popen($sendmail, 'w');
if (!$mail) {
throw new Exception($this->lang('execute') . $this->Sendmail, self::STOP_CRITICAL);
}
$this->edebug("To: {$toAddr}");
fwrite($mail, 'To: ' . $toAddr . "\n");
fwrite($mail, $header);
fwrite($mail, $body);
$result = pclose($mail);
$addrinfo = static::parseAddresses($toAddr, true, $this->CharSet);
$this->doCallback(
($result === 0),
[[$addrinfo['address'], $addrinfo['name']]],
$this->cc,
$this->bcc,
$this->Subject,
$body,
$this->From,
[]
);
$this->edebug("Result: " . ($result === 0 ? 'true' : 'false'));
if (0 !== $result) {
throw new Exception($this->lang('execute') . $this->Sendmail, self::STOP_CRITICAL);
}
}
} else {
$mail = @popen($sendmail, 'w');
if (!$mail) {
throw new Exception($this->lang('execute') . $this->Sendmail, self::STOP_CRITICAL);
}
fwrite($mail, $header);
fwrite($mail, $body);
$result = pclose($mail);
$this->doCallback(
($result === 0),
$this->to,
$this->cc,
$this->bcc,
$this->Subject,
$body,
$this->From,
[]
);
$this->edebug("Result: " . ($result === 0 ? 'true' : 'false'));
if (0 !== $result) {
throw new Exception($this->lang('execute') . $this->Sendmail, self::STOP_CRITICAL);
}
}
return true;
}
/**
* Fix CVE-2016-10033 and CVE-2016-10045 by disallowing potentially unsafe shell characters.
* Note that escapeshellarg and escapeshellcmd are inadequate for our purposes, especially on Windows.
*
* @see https://github.com/PHPMailer/PHPMailer/issues/924 CVE-2016-10045 bug report
*
* @param string $string The string to be validated
*
* @return bool
*/
protected static function isShellSafe($string)
{
//It's not possible to use shell commands safely (which includes the mail() function) without escapeshellarg,
//but some hosting providers disable it, creating a security problem that we don't want to have to deal with,
//so we don't.
if (!function_exists('escapeshellarg') || !function_exists('escapeshellcmd')) {
return false;
}
if (
escapeshellcmd($string) !== $string
|| !in_array(escapeshellarg($string), ["'$string'", "\"$string\""])
) {
return false;
}
$length = strlen($string);
for ($i = 0; $i < $length; ++$i) {
$c = $string[$i];
//All other characters have a special meaning in at least one common shell, including = and +.
//Full stop (.) has a special meaning in cmd.exe, but its impact should be negligible here.
//Note that this does permit non-Latin alphanumeric characters based on the current locale.
if (!ctype_alnum($c) && strpos('@_-.', $c) === false) {
return false;
}
}
return true;
}
/**
* Check whether a file path is of a permitted type.
* Used to reject URLs and phar files from functions that access local file paths,
* such as addAttachment.
*
* @param string $path A relative or absolute path to a file
*
* @return bool
*/
protected static function isPermittedPath($path)
{
//Matches scheme definition from https://tools.ietf.org/html/rfc3986#section-3.1
return !preg_match('#^[a-z][a-z\d+.-]*://#i', $path);
}
/**
* Check whether a file path is safe, accessible, and readable.
*
* @param string $path A relative or absolute path to a file
*
* @return bool
*/
protected static function fileIsAccessible($path)
{
if (!static::isPermittedPath($path)) {
return false;
}
$readable = file_exists($path);
//If not a UNC path (expected to start with \\), check read permission, see #2069
if (strpos($path, '\\\\') !== 0) {
$readable = $readable && is_readable($path);
}
return $readable;
}
/**
* Send mail using the PHP mail() function.
*
* @see http://www.php.net/manual/en/book.mail.php
*
* @param string $header The message headers
* @param string $body The message body
*
* @throws Exception
*
* @return bool
*/
protected function mailSend($header, $body)
{
$header = static::stripTrailingWSP($header) . static::$LE . static::$LE;
$toArr = [];
foreach ($this->to as $toaddr) {
$toArr[] = $this->addrFormat($toaddr);
}
$to = trim(implode(', ', $toArr));
//If there are no To-addresses (e.g. when sending only to BCC-addresses)
//the following should be added to get a correct DKIM-signature.
//Compare with $this->preSend()
if ($to === '') {
$to = 'undisclosed-recipients:;';
}
$params = null;
//This sets the SMTP envelope sender which gets turned into a return-path header by the receiver
//A space after `-f` is optional, but there is a long history of its presence
//causing problems, so we don't use one
//Exim docs: http://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_exim_command_line.html
//Sendmail docs: http://www.sendmail.org/~ca/email/man/sendmail.html
//Qmail docs: http://www.qmail.org/man/man8/qmail-inject.html
//Example problem: https://www.drupal.org/node/1057954
//CVE-2016-10033, CVE-2016-10045: Don't pass -f if characters will be escaped.
//PHP 5.6 workaround
$sendmail_from_value = ini_get('sendmail_from');
if (empty($this->Sender) && !empty($sendmail_from_value)) {
//PHP config has a sender address we can use
$this->Sender = ini_get('sendmail_from');
}
if (!empty($this->Sender) && static::validateAddress($this->Sender)) {
if (self::isShellSafe($this->Sender)) {
$params = sprintf('-f%s', $this->Sender);
}
$old_from = ini_get('sendmail_from');
ini_set('sendmail_from', $this->Sender);
}
$result = false;
if ($this->SingleTo && count($toArr) > 1) {
foreach ($toArr as $toAddr) {
$result = $this->mailPassthru($toAddr, $this->Subject, $body, $header, $params);
$addrinfo = static::parseAddresses($toAddr, true, $this->CharSet);
$this->doCallback(
$result,
[[$addrinfo['address'], $addrinfo['name']]],
$this->cc,
$this->bcc,
$this->Subject,
$body,
$this->From,
[]
);
}
} else {
$result = $this->mailPassthru($to, $this->Subject, $body, $header, $params);
$this->doCallback($result, $this->to, $this->cc, $this->bcc, $this->Subject, $body, $this->From, []);
}
if (isset($old_from)) {
ini_set('sendmail_from', $old_from);
}
if (!$result) {
throw new Exception($this->lang('instantiate'), self::STOP_CRITICAL);
}
return true;
}
/**
* Get an instance to use for SMTP operations.
* Override this function to load your own SMTP implementation,
* or set one with setSMTPInstance.
*
* @return SMTP
*/
public function getSMTPInstance()
{
if (!is_object($this->smtp)) {
$this->smtp = new SMTP();
}
return $this->smtp;
}
/**
* Provide an instance to use for SMTP operations.
*
* @return SMTP
*/
public function setSMTPInstance(SMTP $smtp)
{
$this->smtp = $smtp;
return $this->smtp;
}
/**
* Send mail via SMTP.
* Returns false if there is a bad MAIL FROM, RCPT, or DATA input.
*
* @see PHPMailer::setSMTPInstance() to use a different class.
*
* @uses \PHPMailer\PHPMailer\SMTP
*
* @param string $header The message headers
* @param string $body The message body
*
* @throws Exception
*
* @return bool
*/
protected function smtpSend($header, $body)
{
$header = static::stripTrailingWSP($header) . static::$LE . static::$LE;
$bad_rcpt = [];
if (!$this->smtpConnect($this->SMTPOptions)) {
throw new Exception($this->lang('smtp_connect_failed'), self::STOP_CRITICAL);
}
//Sender already validated in preSend()
if ('' === $this->Sender) {
$smtp_from = $this->From;
} else {
$smtp_from = $this->Sender;
}
if (!$this->smtp->mail($smtp_from)) {
$this->setError($this->lang('from_failed') . $smtp_from . ' : ' . implode(',', $this->smtp->getError()));
throw new Exception($this->ErrorInfo, self::STOP_CRITICAL);
}
$callbacks = [];
//Attempt to send to all recipients
foreach ([$this->to, $this->cc, $this->bcc] as $togroup) {
foreach ($togroup as $to) {
if (!$this->smtp->recipient($to[0], $this->dsn)) {
$error = $this->smtp->getError();
$bad_rcpt[] = ['to' => $to[0], 'error' => $error['detail']];
$isSent = false;
} else {
$isSent = true;
}
$callbacks[] = ['issent' => $isSent, 'to' => $to[0], 'name' => $to[1]];
}
}
//Only send the DATA command if we have viable recipients
if ((count($this->all_recipients) > count($bad_rcpt)) && !$this->smtp->data($header . $body)) {
throw new Exception($this->lang('data_not_accepted'), self::STOP_CRITICAL);
}
$smtp_transaction_id = $this->smtp->getLastTransactionID();
if ($this->SMTPKeepAlive) {
$this->smtp->reset();
} else {
$this->smtp->quit();
$this->smtp->close();
}
foreach ($callbacks as $cb) {
$this->doCallback(
$cb['issent'],
[[$cb['to'], $cb['name']]],
[],
[],
$this->Subject,
$body,
$this->From,
['smtp_transaction_id' => $smtp_transaction_id]
);
}
//Create error message for any bad addresses
if (count($bad_rcpt) > 0) {
$errstr = '';
foreach ($bad_rcpt as $bad) {
$errstr .= $bad['to'] . ': ' . $bad['error'];
}
throw new Exception($this->lang('recipients_failed') . $errstr, self::STOP_CONTINUE);
}
return true;
}
/**
* Initiate a connection to an SMTP server.
* Returns false if the operation failed.
*
* @param array $options An array of options compatible with stream_context_create()
*
* @throws Exception
*
* @uses \PHPMailer\PHPMailer\SMTP
*
* @return bool
*/
public function smtpConnect($options = null)
{
if (null === $this->smtp) {
$this->smtp = $this->getSMTPInstance();
}
//If no options are provided, use whatever is set in the instance
if (null === $options) {
$options = $this->SMTPOptions;
}
//Already connected?
if ($this->smtp->connected()) {
return true;
}
$this->smtp->setTimeout($this->Timeout);
$this->smtp->setDebugLevel($this->SMTPDebug);
$this->smtp->setDebugOutput($this->Debugoutput);
$this->smtp->setVerp($this->do_verp);
$hosts = explode(';', $this->Host);
$lastexception = null;
foreach ($hosts as $hostentry) {
$hostinfo = [];
if (
!preg_match(
'/^(?:(ssl|tls):\/\/)?(.+?)(?::(\d+))?$/',
trim($hostentry),
$hostinfo
)
) {
$this->edebug($this->lang('invalid_hostentry') . ' ' . trim($hostentry));
//Not a valid host entry
continue;
}
//$hostinfo[1]: optional ssl or tls prefix
//$hostinfo[2]: the hostname
//$hostinfo[3]: optional port number
//The host string prefix can temporarily override the current setting for SMTPSecure
//If it's not specified, the default value is used
//Check the host name is a valid name or IP address before trying to use it
if (!static::isValidHost($hostinfo[2])) {
$this->edebug($this->lang('invalid_host') . ' ' . $hostinfo[2]);
continue;
}
$prefix = '';
$secure = $this->SMTPSecure;
$tls = (static::ENCRYPTION_STARTTLS === $this->SMTPSecure);
if ('ssl' === $hostinfo[1] || ('' === $hostinfo[1] && static::ENCRYPTION_SMTPS === $this->SMTPSecure)) {
$prefix = 'ssl://';
$tls = false; //Can't have SSL and TLS at the same time
$secure = static::ENCRYPTION_SMTPS;
} elseif ('tls' === $hostinfo[1]) {
$tls = true;
//TLS doesn't use a prefix
$secure = static::ENCRYPTION_STARTTLS;
}
//Do we need the OpenSSL extension?
$sslext = defined('OPENSSL_ALGO_SHA256');
if (static::ENCRYPTION_STARTTLS === $secure || static::ENCRYPTION_SMTPS === $secure) {
//Check for an OpenSSL constant rather than using extension_loaded, which is sometimes disabled
if (!$sslext) {
throw new Exception($this->lang('extension_missing') . 'openssl', self::STOP_CRITICAL);
}
}
$host = $hostinfo[2];
$port = $this->Port;
if (
array_key_exists(3, $hostinfo) &&
is_numeric($hostinfo[3]) &&
$hostinfo[3] > 0 &&
$hostinfo[3] < 65536
) {
$port = (int) $hostinfo[3];
}
if ($this->smtp->connect($prefix . $host, $port, $this->Timeout, $options)) {
try {
if ($this->Helo) {
$hello = $this->Helo;
} else {
$hello = $this->serverHostname();
}
$this->smtp->hello($hello);
//Automatically enable TLS encryption if:
//* it's not disabled
//* we have openssl extension
//* we are not already using SSL
//* the server offers STARTTLS
if ($this->SMTPAutoTLS && $sslext && 'ssl' !== $secure && $this->smtp->getServerExt('STARTTLS')) {
$tls = true;
}
if ($tls) {
if (!$this->smtp->startTLS()) {
$message = $this->getSmtpErrorMessage('connect_host');
throw new Exception($message);
}
//We must resend EHLO after TLS negotiation
$this->smtp->hello($hello);
}
if (
$this->SMTPAuth && !$this->smtp->authenticate(
$this->Username,
$this->Password,
$this->AuthType,
$this->oauth
)
) {
throw new Exception($this->lang('authenticate'));
}
return true;
} catch (Exception $exc) {
$lastexception = $exc;
$this->edebug($exc->getMessage());
//We must have connected, but then failed TLS or Auth, so close connection nicely
$this->smtp->quit();
}
}
}
//If we get here, all connection attempts have failed, so close connection hard
$this->smtp->close();
//As we've caught all exceptions, just report whatever the last one was
if ($this->exceptions && null !== $lastexception) {
throw $lastexception;
}
if ($this->exceptions) {
// no exception was thrown, likely $this->smtp->connect() failed
$message = $this->getSmtpErrorMessage('connect_host');
throw new Exception($message);
}
return false;
}
/**
* Close the active SMTP session if one exists.
*/
public function smtpClose()
{
if ((null !== $this->smtp) && $this->smtp->connected()) {
$this->smtp->quit();
$this->smtp->close();
}
}
/**
* Set the language for error messages.
* The default language is English.
*
* @param string $langcode ISO 639-1 2-character language code (e.g. French is "fr")
* Optionally, the language code can be enhanced with a 4-character
* script annotation and/or a 2-character country annotation.
* @param string $lang_path Path to the language file directory, with trailing separator (slash)
* Do not set this from user input!
*
* @return bool Returns true if the requested language was loaded, false otherwise.
*/
public function setLanguage($langcode = 'en', $lang_path = '')
{
//Backwards compatibility for renamed language codes
$renamed_langcodes = [
'br' => 'pt_br',
'cz' => 'cs',
'dk' => 'da',
'no' => 'nb',
'se' => 'sv',
'rs' => 'sr',
'tg' => 'tl',
'am' => 'hy',
];
if (array_key_exists($langcode, $renamed_langcodes)) {
$langcode = $renamed_langcodes[$langcode];
}
//Define full set of translatable strings in English
$PHPMAILER_LANG = [
'authenticate' => 'SMTP Error: Could not authenticate.',
'buggy_php' => 'Your version of PHP is affected by a bug that may result in corrupted messages.' .
' To fix it, switch to sending using SMTP, disable the mail.add_x_header option in' .
' your php.ini, switch to MacOS or Linux, or upgrade your PHP to version 7.0.17+ or 7.1.3+.',
'connect_host' => 'SMTP Error: Could not connect to SMTP host.',
'data_not_accepted' => 'SMTP Error: data not accepted.',
'empty_message' => 'Message body empty',
'encoding' => 'Unknown encoding: ',
'execute' => 'Could not execute: ',
'extension_missing' => 'Extension missing: ',
'file_access' => 'Could not access file: ',
'file_open' => 'File Error: Could not open file: ',
'from_failed' => 'The following From address failed: ',
'instantiate' => 'Could not instantiate mail function.',
'invalid_address' => 'Invalid address: ',
'invalid_header' => 'Invalid header name or value',
'invalid_hostentry' => 'Invalid hostentry: ',
'invalid_host' => 'Invalid host: ',
'mailer_not_supported' => ' mailer is not supported.',
'provide_address' => 'You must provide at least one recipient email address.',
'recipients_failed' => 'SMTP Error: The following recipients failed: ',
'signing' => 'Signing Error: ',
'smtp_code' => 'SMTP code: ',
'smtp_code_ex' => 'Additional SMTP info: ',
'smtp_connect_failed' => 'SMTP connect() failed.',
'smtp_detail' => 'Detail: ',
'smtp_error' => 'SMTP server error: ',
'variable_set' => 'Cannot set or reset variable: ',
];
if (empty($lang_path)) {
//Calculate an absolute path so it can work if CWD is not here
$lang_path = dirname(__DIR__) . DIRECTORY_SEPARATOR . 'language' . DIRECTORY_SEPARATOR;
}
//Validate $langcode
$foundlang = true;
$langcode = strtolower($langcode);
if (
!preg_match('/^(?P[a-z]{2})(?P