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<?php/*** PHPMailer RFC821 SMTP email transport class.* PHP Version 5* @package PHPMailer* @link https://github.com/PHPMailer/PHPMailer/ The PHPMailer GitHub project* @author Marcus Bointon (Synchro/coolbru) <phpmailer@synchromedia.co.uk>* @author Jim Jagielski (jimjag) <jimjag@gmail.com>* @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net>* @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 <phpmailer@synchromedia.co.uk>*/class SMTP{/*** The PHPMailer SMTP version number.* @var string*/const VERSION = '5.2.15';/*** 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 = '5.2.15';/*** 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 `<br>`, 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:* <code>* $smtp->Debugoutput = function($str, $level) {echo "debug level $level; message: $str";};* </code>* @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;/*** 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 > $this->do_debug) {return;}//Avoid clash with built-in function namesif (!in_array($this->Debugoutput, array('error_log', 'html', 'echo')) and is_callable($this->Debugoutput)) {call_user_func($this->Debugoutput, $str, $this->do_debug);return;}switch ($this->Debugoutput) {case 'error_log'://Don't output, just logerror_log($str);break;case 'html'://Cleans up output a bit for a better looking, HTML-safe outputecho htmlentities(preg_replace('/[\r\n]+/', '', $str),ENT_QUOTES,'UTF-8'). "<br>\n";break;case 'echo':default://Normalize line breaks$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 $streamok;//This is enabled by default since 5.0.0 but some providers disable it//Check this once and cache the resultif (is_null($streamok)) {$streamok = function_exists('stream_socket_client');}// Clear errors to avoid confusion$this->setError('');// Make sure we are __not__ connectedif ($this->connected()) {// Already connected, generate error$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($options);//Suppress errors; connection failures are handled at a higher level$this->smtp_conn = @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);$this->smtp_conn = fsockopen($host,$port,$errno,$errstr,$timeout);}// Verify we connected properlyif (!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;}$this->edebug('Connection: opened', self::DEBUG_CONNECTION);// SMTP server can take longer to respond, give longer timeout for first read// Windows does not have support for this timeout functionif (substr(PHP_OS, 0, 3) != 'WIN') {$max = ini_get('max_execution_time');// Don't bother if unlimitedif ($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$crypto_method = STREAM_CRYPTO_METHOD_TLS_CLIENT;//PHP 5.6.7 dropped inclusion of TLS 1.1 and 1.2 in STREAM_CRYPTO_METHOD_TLS_CLIENT//so add them back in manually if we canif (defined('STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT')) {$crypto_method |= STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT;$crypto_method |= STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT;}// Begin encrypted connectionif (!stream_socket_enable_crypto($this->smtp_conn,true,$crypto_method)) {return false;}return true;}/*** 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. Let's try to find a proper authentication methodif (!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 STARTTLSreturn 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 authenticationif (!$this->sendCommand('AUTH', 'AUTH PLAIN', 334)) {return false;}// Send encoded username and passwordif (!$this->sendCommand('User & Password',base64_encode("\0" . $username . "\0" . $password),235)) {return false;}break;case 'LOGIN':// Start authenticationif (!$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 PHPMailerOAuthif (is_null($OAuth)) {return false;}$oauth = $OAuth->getOauth64();// Start authenticationif (!$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;$ntlm_client = new ntlm_sasl_client_class;//Check that functions are availableif (!$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, $workstation); //msg1if (!$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 usernamereturn $this->sendCommand('Username', base64_encode($msg3), 235);case 'CRAM-MD5':// Start authenticationif (!$this->sendCommand('AUTH CRAM-MD5', 'AUTH CRAM-MD5', 334)) {return false;}// Get the challenge$challenge = base64_decode(substr($this->last_reply, 4));// Build the response$response = $username . ' ' . $this->hmac($challenge, $password);// send encoded credentialsreturn $this->sendCommand('Username', base64_encode($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 md5if (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($this->smtp_conn)) {// close the connection and cleanupfclose($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 <CRLF> with the message headers* and the message body being separated by and additional <CRLF>.* Implements rfc 821: DATA <CRLF>* @param string $msg_data Message data to send* @access public* @return boolean*/public function data($msg_data){//This will use the standard timelimitif (!$this->sendCommand('DATA', 'DATA', 354)) {return false;}/* The server is ready to accept data!* According to rfc821 we should not send more than 1000 characters on a single line (including the CRLF)* so we will break the data up into lines by \r and/or \n then if needed we will break each of those into* smaller lines to fit within the limit.* We will also look for lines that start with a '.' and prepend an additional '.'.* NOTE: this does not count towards line-length limit.*/// Normalize line breaks before exploding$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 0if (!$pos) {//No nice break found, add a hard break$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, $pos + 1);}//If processing headers add a LWSP-char to the front of new line RFC822 section 3.1.1if ($in_headers) {$line = "\t" . $line;}}$lines_out[] = $line;//Send the lines to the serverforeach ($lines_out as $line_out) {//RFC2821 section 4.5.2if (!empty($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 = $this->sendCommand('DATA END', '.', 250);//Restore timelimit$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 <SP> <domain> <CRLF>* 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 <SP> FROM:<reverse-path> <CRLF>* @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 <CRLF>* @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 = $this->error; //Save any errorif ($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 <SP> TO:<forward-path> <CRLF>* @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 <CRLF>* @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 $command without being connected");return false;}//Reject line breaks in all commandsif (strpos($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 <SP> FROM:<reverse-path> <CRLF>* @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 $this->sendCommand('NOOP', 'NOOP', 250);}/*** Send an SMTP TURN command.* This is an optional command for SMTP that this class does not support.* This method is here to make the RFC821 Definition complete for this class* and _may_ be implemented in future* Implements from rfc 821: TURN <CRLF>* @access public* @return boolean*/public function turn(){$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: $data", self::DEBUG_CLIENT);return fwrite($this->smtp_conn, $data);}/*** 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 $this->last_reply;}/*** Read the SMTP server's response.* Either before eof or socket timeout occurs on the operation.* With SMTP we can tell if we have more lines to read if the* 4th character is '-' symbol. If it is a space then we don't* need to read anything else.* @access protected* @return string*/protected function get_lines(){// If the connection is bad, give up straight awayif (!is_resource($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 .= $str;// If 4th character is a space, we are done reading, break the loop, micro-optimisation over strlenif ((isset($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 (' . $this->Timeout . ' sec)',self::DEBUG_LOWLEVEL);break;}// Now check if reads took too longif ($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;}}