* @author Jim Jagielski (jimjag) * @author Andy Prevost (codeworxtech) * @author Brent R. Matzelle (original founder) * @copyright 2014 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. */ /** * PHPMailer RFC821 SMTP email transport class. * Implements RFC 821 SMTP commands and provides some utility methods for sending mail to an SMTP server. * @package PHPMailer * @author Chris Ryan * @author Marcus Bointon */ class SMTP { /** * The PHPMailer SMTP version number. * @var string */ const VERSION = '5.2.28'; /** * SMTP line break constant. * @var string */ const CRLF = "\r\n"; /** * The SMTP port to use if one is not specified. * @var integer */ const DEFAULT_SMTP_PORT = 25; /** * The maximum line length allowed by RFC 2822 section 2.1.1 * @var integer */ const MAX_LINE_LENGTH = 998; /** * Debug level for no output */ const DEBUG_OFF = 0; /** * Debug level to show client -> server messages */ const DEBUG_CLIENT = 1; /** * Debug level to show client -> server and server -> client messages */ const DEBUG_SERVER = 2; /** * Debug level to show connection status, client -> server and server -> client messages */ const DEBUG_CONNECTION = 3; /** * Debug level to show all messages */ const DEBUG_LOWLEVEL = 4; /** * The PHPMailer SMTP Version number. * @var string * @deprecated Use the `VERSION` constant instead * @see SMTP::VERSION */ public $Version = '5.2.28'; /** * SMTP server port number. * @var integer * @deprecated This is only ever used as a default value, so use the `DEFAULT_SMTP_PORT` constant instead * @see SMTP::DEFAULT_SMTP_PORT */ public $SMTP_PORT = 25; /** * SMTP reply line ending. * @var string * @deprecated Use the `CRLF` constant instead * @see SMTP::CRLF */ public $CRLF = "\r\n"; /** * 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 integer */ 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: * * $smtp->Debugoutput = function($str, $level) {echo "debug level $level; message: $str";}; * * @var string|callable */ public $Debugoutput = 'echo'; /** * Whether to use VERP. * @link http://en.wikipedia.org/wiki/Variable_envelope_return_path * @link http://www.postfix.org/VERP_README.html Info on VERP * @var boolean */ 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. * @link http://tools.ietf.org/html/rfc2821#section-4.5.3.2 * @var integer */ 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 integer */ public $Timelimit = 300; /** * @var array 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. */ protected $smtp_transaction_id_patterns = array( 'exim' => '/[0-9]{3} OK id=(.*)/', 'sendmail' => '/[0-9]{3} 2.0.0 (.*) Message/', 'postfix' => '/[0-9]{3} 2.0.0 Ok: queued as (.*)/' ); /** * @var string The last transaction ID issued in response to a DATA command, * if one was detected */ 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 = array( '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 = null; /** * 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 = null; /** * The most recent reply received from the server. * @var string */ protected $last_reply = ''; /** * Output debugging info via a user-selected method. * @see SMTP::$Debugoutput * @see SMTP::$do_debug * @param string $str Debug string to output * @param integer $level The debug level of this message; see DEBUG_* constants * @return void */ protected function edebug($str, $level = 0) { if ($level > $this->do_debug) { return; } //Avoid clash with built-in function names if (!in_array($this->Debugoutput, array('error_log', 'html', 'echo')) and is_callable($this->Debugoutput)) { call_user_func($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|\n)/ms', "\n", $str); echo gmdate('Y-m-d H:i:s') . "\t" . str_replace( "\n", "\n \t ", trim($str) ) . "\n"; } } /** * Connect to an SMTP server. * @param string $host SMTP server IP or host name * @param integer $port The port number to connect to * @param integer $timeout How long to wait for the connection to open * @param array $options An array of options for stream_context_create() * @access public * @return boolean */ public function connect($host, $port = null, $timeout = 30, $options = array()) { static $streamok; //This is enabled by default since 5.0.0 but some providers disable it //Check this once and cache the result if (is_null($streamok)) { $streamok = function_exists('stream_socket_client'); } // 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_SMTP_PORT; } // Connect to the SMTP server $this->edebug( "Connection: opening to $host:$port, timeout=$timeout, options=" . var_export($options, true), self::DEBUG_CONNECTION ); $errno = 0; $errstr = ''; if ($streamok) { $socket_context = stream_context_create($options); set_error_handler(array($this, 'errorHandler')); $this->smtp_conn = stream_socket_client( $host . ":" . $port, $errno, $errstr, $timeout, STREAM_CLIENT_CONNECT, $socket_context ); restore_error_handler(); } else { //Fall back to fsockopen which should work in more places, but is missing some features $this->edebug( "Connection: stream_socket_client not available, falling back to fsockopen", self::DEBUG_CONNECTION ); set_error_handler(array($this, 'errorHandler')); $this->smtp_conn = fsockopen( $host, $port, $errno, $errstr, $timeout ); restore_error_handler(); } // Verify we connected properly if (!is_resource($this->smtp_conn)) { $this->setError( 'Failed to connect to server', $errno, $errstr ); $this->edebug( 'SMTP ERROR: ' . $this->error['error'] . ": $errstr ($errno)", self::DEBUG_CLIENT ); return false; } $this->edebug('Connection: opened', self::DEBUG_CONNECTION); // SMTP server can take longer to respond, give longer timeout for first read // Windows does not have support for this timeout function if (substr(PHP_OS, 0, 3) != 'WIN') { $max = ini_get('max_execution_time'); // Don't bother if unlimited if ($max != 0 && $timeout > $max) { @set_time_limit($timeout); } stream_set_timeout($this->smtp_conn, $timeout, 0); } // Get any announcement $announce = $this->get_lines(); $this->edebug('SERVER -> CLIENT: ' . $announce, self::DEBUG_SERVER); return true; } /** * Initiate a TLS (encrypted) session. * @access public * @return boolean */ public function startTLS() { if (!$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; $crypto_method |= STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT; } // Begin encrypted connection set_error_handler(array($this, 'errorHandler')); $crypto_ok = stream_socket_enable_crypto( $this->smtp_conn, true, $crypto_method ); restore_error_handler(); return $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 (PLAIN, LOGIN, NTLM, CRAM-MD5, XOAUTH2) * @param string $realm The auth realm for NTLM * @param string $workstation The auth workstation for NTLM * @param null|OAuth $OAuth An optional OAuth instance (@see PHPMailerOAuth) * @return bool True if successfully authenticated.* @access public */ public function authenticate( $username, $password, $authtype = null, $realm = '', $workstation = '', $OAuth = null ) { if (!$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)) { $this->setError('Authentication is not allowed at this stage'); // 'at this stage' means that auth may be allowed after the stage changes // e.g. after STARTTLS return false; } self::edebug('Auth method requested: ' . ($authtype ? $authtype : 'UNKNOWN'), self::DEBUG_LOWLEVEL); self::edebug( 'Auth methods available on the server: ' . implode(',', $this->server_caps['AUTH']), self::DEBUG_LOWLEVEL ); if (empty($authtype)) { foreach (array('CRAM-MD5', 'LOGIN', 'PLAIN', 'NTLM', 'XOAUTH2') as $method) { if (in_array($method, $this->server_caps['AUTH'])) { $authtype = $method; break; } } if (empty($authtype)) { $this->setError('No supported authentication methods found'); return false; } self::edebug('Auth method selected: ' . $authtype, self::DEBUG_LOWLEVEL); } if (!in_array($authtype, $this->server_caps['AUTH'])) { $this->setError("The requested authentication method \"$authtype\" is not supported by the server"); return false; } } elseif (empty($authtype)) { $authtype = 'LOGIN'; } switch ($authtype) { case 'PLAIN': // Start authentication if (!$this->sendCommand('AUTH', 'AUTH PLAIN', 334)) { return false; } // Send encoded username and password if (!$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 'XOAUTH2': //If the OAuth Instance is not set. Can be a case when PHPMailer is used //instead of PHPMailerOAuth if (is_null($OAuth)) { return false; } $oauth = $OAuth->getOauth64(); // Start authentication if (!$this->sendCommand('AUTH', 'AUTH XOAUTH2 ' . $oauth, 235)) { return false; } break; case 'NTLM': /* * ntlm_sasl_client.php * Bundled with Permission * * How to telnet in windows: * http://technet.microsoft.com/en-us/library/aa995718%28EXCHG.65%29.aspx * PROTOCOL Docs http://curl.haxx.se/rfc/ntlm.html#ntlmSmtpAuthentication */ require_once 'extras/ntlm_sasl_client.php'; $temp = new stdClass; $ntlm_client = new ntlm_sasl_client_class; //Check that functions are available if (!$ntlm_client->initialize($temp)) { $this->setError($temp->error); $this->edebug( 'You need to enable some modules in your php.ini file: ' . $this->error['error'], self::DEBUG_CLIENT ); return false; } //msg1 $msg1 = $ntlm_client->typeMsg1($realm, $workstation); //msg1 if (!$this->sendCommand( 'AUTH NTLM', 'AUTH NTLM ' . base64_encode($msg1), 334 ) ) { return false; } //Though 0 based, there is a white space after the 3 digit number //msg2 $challenge = substr($this->last_reply, 3); $challenge = base64_decode($challenge); $ntlm_res = $ntlm_client->NTLMResponse( substr($challenge, 24, 8), $password ); //msg3 $msg3 = $ntlm_client->typeMsg3( $ntlm_res, $username, $realm, $workstation ); // send encoded username return $this->sendCommand('Username', base64_encode($msg3), 235); 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); 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 $key The key to hash with * @access protected * @return string */ protected function hmac($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 . $data))); } /** * Check connection state. * @access public * @return boolean True if connected. */ public function connected() { if (is_resource($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() * @access public * @return void */ 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, * finializing 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 and additional . * Implements rfc 821: DATA * @param string $msg_data Message data to send * @access public * @return boolean */ public function data($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 CRLF) * 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(array("\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) { $lines_out = array(); if ($in_headers and $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 $line_out) { //RFC2821 section 4.5.2 if (!empty($line_out) and $line_out[0] == '.') { $line_out = '.' . $line_out; } $this->client_send($line_out . self::CRLF); } } //Message data has been sent, complete the command //Increase timelimit for end of DATA command $savetimelimit = $this->Timelimit; $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 $host The host name or IP to connect to * @access public * @return boolean */ public function hello($host = '') { //Try extended hello first (RFC 2821) return (boolean)($this->sendHello('EHLO', $host) or $this->sendHello('HELO', $host)); } /** * Send an SMTP HELO or EHLO command. * Low-level implementation used by hello() * @see hello() * @param string $hello The HELO string * @param string $host The hostname to say we are * @access protected * @return boolean */ protected function sendHello($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. * @access protected * @param string $type - 'HELO' or 'EHLO' */ protected function parseHelloFields($type) { $this->server_caps = array(); $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 = array(); } 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 $from Source address of this message * @access public * @return boolean */ public function mail($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 boolean $close_on_error Should the connection close if an error occurs? * @access public * @return boolean */ public function quit($close_on_error = true) { $noerror = $this->sendCommand('QUIT', 'QUIT', 221); $err = $this->error; //Save any error if ($noerror or $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 $address The address the message is being sent to * @access public * @return boolean */ public function recipient($address) { return $this->sendCommand( 'RCPT TO', 'RCPT TO:<' . $address . '>', array(250, 251) ); } /** * Send an SMTP RSET command. * Abort any transaction that is currently in progress. * Implements rfc 821: RSET * @access public * @return boolean 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 integer|array $expect One or more expected integer success codes * @access protected * @return boolean True on success. */ protected function sendCommand($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 or strpos($commandstring, "\r") !== false) { $this->setError("Command '$command' contained line breaks"); return false; } $this->client_send($commandstring . self::CRLF); $this->last_reply = $this->get_lines(); // Fetch SMTP code and possible error code explanation $matches = array(); if (preg_match("/^([0-9]{3})[ -](?:([0-9]\\.[0-9]\\.[0-9]) )?/", $this->last_reply, $matches)) { $code = $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 $code = substr($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)) { $this->setError( "$command command failed", $detail, $code, $code_ex ); $this->edebug( 'SMTP ERROR: ' . $this->error['error'] . ': ' . $this->last_reply, self::DEBUG_CLIENT ); return false; } $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 $from The address the message is from * @access public * @return boolean */ public function sendAndMail($from) { return $this->sendCommand('SAML', "SAML FROM:$from", 250); } /** * Send an SMTP VRFY command. * @param string $name The name to verify * @access public * @return boolean */ public function verify($name) { return $this->sendCommand('VRFY', "VRFY $name", array(250, 251)); } /** * Send an SMTP NOOP command. * Used to keep keep-alives alive, doesn't actually do anything * @access public * @return boolean */ 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 * @access public * @return boolean */ 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 $data The data to send * @access public * @return integer|boolean The number of bytes sent to the server or false on error */ public function client_send($data) { $this->edebug("CLIENT -> SERVER: $data", self::DEBUG_CLIENT); set_error_handler(array($this, 'errorHandler')); $result = fwrite($this->smtp_conn, $data); restore_error_handler(); return $result; } /** * Get the latest error. * @access public * @return array */ public function getError() { return $this->error; } /** * Get SMTP extensions available on the server * @access public * @return array|null */ public function getServerExtList() { return $this->server_caps; } /** * A multipurpose method * The method works in three ways, dependent on argument value and current state * 1. HELO/EHLO was not sent - returns null and set up $this->error * 2. HELO was sent * $name = 'HELO': returns server name * $name = 'EHLO': returns boolean false * $name = any string: returns null and set up $this->error * 3. EHLO was sent * $name = 'HELO'|'EHLO': returns server name * $name = any string: if extension $name exists, returns boolean True * or its options. Otherwise returns boolean False * In other words, one can use this method to detect 3 conditions: * - null returned: handshake was not or we don't know about ext (refer to $this->error) * - false returned: the requested feature exactly not exists * - positive value returned: the requested feature exists * @param string $name Name of SMTP extension or 'HELO'|'EHLO' * @return mixed */ public function getServerExt($name) { if (!$this->server_caps) { $this->setError('No HELO/EHLO was sent'); return null; } // the tight logic knot ;) if (!array_key_exists($name, $this->server_caps)) { if ($name == 'HELO') { return $this->server_caps['EHLO']; } if ($name == 'EHLO' || array_key_exists('EHLO', $this->server_caps)) { return false; } $this->setError('HELO handshake was used. Client knows nothing about server extensions'); return null; } return $this->server_caps[$name]; } /** * Get the last reply from the server. * @access public * @return string */ public function getLastReply() { return $this->last_reply; } /** * Read the SMTP server's response. * Either before eof or socket timeout occurs on the operation. * With SMTP we can tell if we have more lines to read if the * 4th character is '-' symbol. If it is a space then we don't * need to read anything else. * @access protected * @return string */ protected function get_lines() { // If the connection is bad, give up straight away if (!is_resource($this->smtp_conn)) { return ''; } $data = ''; $endtime = 0; stream_set_timeout($this->smtp_conn, $this->Timeout); if ($this->Timelimit > 0) { $endtime = time() + $this->Timelimit; } while (is_resource($this->smtp_conn) && !feof($this->smtp_conn)) { $str = @fgets($this->smtp_conn, 515); $this->edebug("SMTP -> get_lines(): \$data is \"$data\"", self::DEBUG_LOWLEVEL); $this->edebug("SMTP -> get_lines(): \$str is \"$str\"", self::DEBUG_LOWLEVEL); $data .= $str; // If response is only 3 chars (not valid, but RFC5321 S4.2 says it must be handled), // or 4th character is a space, we are done reading, break the loop, // string array access is a micro-optimisation over strlen if (!isset($str[3]) or (isset($str[3]) and $str[3] == ' ')) { break; } // Timed-out? Log and break $info = stream_get_meta_data($this->smtp_conn); if ($info['timed_out']) { $this->edebug( 'SMTP -> get_lines(): timed-out (' . $this->Timeout . ' sec)', self::DEBUG_LOWLEVEL ); break; } // Now check if reads took too long if ($endtime and 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 boolean $enabled */ public function setVerp($enabled = false) { $this->do_verp = $enabled; } /** * Get VERP address generation mode. * @return boolean */ 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 = array( '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 integer $level */ public function setDebugLevel($level = 0) { $this->do_debug = $level; } /** * Get debug output level. * @return integer */ public function getDebugLevel() { return $this->do_debug; } /** * Set SMTP timeout. * @param integer $timeout */ public function setTimeout($timeout = 0) { $this->Timeout = $timeout; } /** * Get SMTP timeout. * @return integer */ public function getTimeout() { return $this->Timeout; } /** * Reports an error number and string. * @param integer $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 integer $errline The line number the error occurred on */ protected function errorHandler($errno, $errmsg, $errfile = '', $errline = 0) { $notice = 'Connection failed.'; $this->setError( $notice, $errno, $errmsg ); $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|null|string */ 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 $smtp_transaction_id_pattern) { if (preg_match($smtp_transaction_id_pattern, $reply, $matches)) { $this->last_smtp_transaction_id = $matches[1]; } } } 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|null|string * @see recordLastTransactionID() */ public function getLastTransactionID() { return $this->last_smtp_transaction_id; } } Order Form In Only

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