php通过邮箱找回密码

<?phpclass Smtp{    /* Public Variables */	var $smtp_port;	var $time_out;	var $host_name;	var $log_file;	var $relay_host;	var $debug;	var $auth;	var $user;	var $pass;	/* Private Variables */	var $sock;	/* Constractor */	function smtp($relay_host = "", $smtp_port = 25, $auth = false, $user, $pass) {		$this->debug = false;		$this->smtp_port = $smtp_port;		$this->relay_host = $relay_host;		$this->time_out = 30; //is used in fsockopen()		$this->auth = $auth; //auth		$this->user = $user;		$this->pass = $pass;		$this->host_name = "localhost"; //is used in HELO command		$this->log_file = "";		$this->sock = false;	}	/* Main Function */	function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "") {		$mail_from = $this->get_address($this->strip_comment($from));		$body = ereg_replace("(^|(\r\n))(\.)", "\1.\3", $body);		$header .= "MIME-Version:1.0\r\n";		if ($mailtype == "HTML") {			$header .= "Content-Type:text/html\r\n";		}		$header .= "To: " . $to . "\r\n";		if ($cc != "") {			$header .= "Cc: " . $cc . "\r\n";		}		$header .= "From: $from\r\n";		$header .= "Subject: " . $subject . "\r\n";		$header .= $additional_headers;		$header .= "Date: " . date("r") . "\r\n";		$header .= "X-Mailer:By Redhat (PHP/" . phpversion() . ")\r\n";		list ($msec, $sec) = explode(" ", microtime());		$header .= "Message-ID: \r\n";		$TO = explode(",", $this->strip_comment($to));		if ($cc != "") {			$TO = array_merge($TO, explode(",", $this->strip_comment($cc)));		}		if ($bcc != "") {			$TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));		}		$sent = true;		foreach ($TO as $rcpt_to) {			$rcpt_to = $this->get_address($rcpt_to);			if (!$this->smtp_sockopen($rcpt_to)) {				$this->log_write("Error: Cannot send email to " . $rcpt_to . "\n");				$sent = false;				continue;			}			if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) {				$this->log_write("E-mail has been sent to \n");			} else {				$this->log_write("Error: Cannot send email to \n");				$sent = false;			}			fclose($this->sock);			$this->log_write("Disconnected from remote host\n");		}		return $sent;	}	/* Private Functions */	function smtp_send($helo, $from, $to, $header, $body = "") {		if (!$this->smtp_putcmd("HELO", $helo)) {			return $this->smtp_error("sending HELO command");		}		// auth		if ($this->auth) {			if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) {				return $this->smtp_error("sending HELO command");			}			if (!$this->smtp_putcmd("", base64_encode($this->pass))) {				return $this->smtp_error("sending HELO command");			}		}		if (!$this->smtp_putcmd("MAIL", "FROM:")) {			return $this->smtp_error("sending MAIL FROM command");		}		if (!$this->smtp_putcmd("RCPT", "TO:")) {			return $this->smtp_error("sending RCPT TO command");		}		if (!$this->smtp_putcmd("DATA")) {			return $this->smtp_error("sending DATA command");		}		if (!$this->smtp_message($header, $body)) {			return $this->smtp_error("sending message");		}		if (!$this->smtp_eom()) {			return $this->smtp_error("sending <cr><lf>.<cr><lf> [EOM]");		}		if (!$this->smtp_putcmd("QUIT")) {			return $this->smtp_error("sending QUIT command");		}		return true;	}	function smtp_sockopen($address) {		if ($this->relay_host == "") {			return $this->smtp_sockopen_mx($address);		} else {			return $this->smtp_sockopen_relay();		}	}	function smtp_sockopen_relay() {		$this->log_write("Trying to " . $this->relay_host . ":" . $this->smtp_port . "\n");		$this->sock = @ fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);		if (!($this->sock && $this->smtp_ok())) {			$this->log_write("Error: Cannot connenct to relay host " . $this->relay_host . "\n");			$this->log_write("Error: " . $errstr . " (" . $errno . ")\n");			return false;		}		$this->log_write("Connected to relay host " . $this->relay_host . "\n");		return true;		;	}	function smtp_sockopen_mx($address) {		$domain = ereg_replace("^.+@([^@]+)$", "\1", $address);		if (!@ getmxrr($domain, $MXHOSTS)) {			$this->log_write("Error: Cannot resolve MX \"" . $domain . "\"\n");			return false;		}		foreach ($MXHOSTS as $host) {			$this->log_write("Trying to " . $host . ":" . $this->smtp_port . "\n");			$this->sock = @ fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);			if (!($this->sock && $this->smtp_ok())) {				$this->log_write("Warning: Cannot connect to mx host " . $host . "\n");				$this->log_write("Error: " . $errstr . " (" . $errno . ")\n");				continue;			}			$this->log_write("Connected to mx host " . $host . "\n");			return true;		}		$this->log_write("Error: Cannot connect to any mx hosts (" . implode(", ", $MXHOSTS) . ")\n");		return false;	}	function smtp_message($header, $body) {		fputs($this->sock, $header . "\r\n" . $body);		$this->smtp_debug("> " . str_replace("\r\n", "\n" . "> ", $header . "\n> " . $body . "\n> "));		return true;	}	function smtp_eom() {		fputs($this->sock, "\r\n.\r\n");		$this->smtp_debug(". [EOM]\n");		return $this->smtp_ok();	}	function smtp_ok() {		$response = str_replace("\r\n", "", fgets($this->sock, 512));		$this->smtp_debug($response . "\n");		if (!ereg("^[23]", $response)) {			fputs($this->sock, "QUIT\r\n");			fgets($this->sock, 512);			$this->log_write("Error: Remote host returned \"" . $response . "\"\n");			return false;		}		return true;	}	function smtp_putcmd($cmd, $arg = "") {		if ($arg != "") {			if ($cmd == "")				$cmd = $arg;			else				$cmd = $cmd . " " . $arg;		}		fputs($this->sock, $cmd . "\r\n");		$this->smtp_debug("> " . $cmd . "\n");		return $this->smtp_ok();	}	function smtp_error($string) {		$this->log_write("Error: Error occurred while " . $string . ".\n");		return false;	}	function log_write($message) {		$this->smtp_debug($message);		if ($this->log_file == "") {			return true;		}		$message = date("M d H:i:s ") . get_current_user() . "[" . getmypid() . "]: " . $message;		if (!@ file_exists($this->log_file) || !($fp = @ fopen($this->log_file, "a"))) {			$this->smtp_debug("Warning: Cannot open log file \"" . $this->log_file . "\"\n");			return false;			;		}		flock($fp, LOCK_EX);		fputs($fp, $message);		fclose($fp);		return true;	}	function strip_comment($address) {		$comment = "\([^()]*\)";		while (ereg($comment, $address)) {			$address = ereg_replace($comment, "", $address);		}		return $address;	}	function get_address($address) {		$address = ereg_replace("([ \t\r\n])+", "", $address);		$address = ereg_replace("^.*.*$", "\1", $address);		return $address;	}	function smtp_debug($message) {		if ($this->debug) {			echo $message . "			;";		}	}}?></lf></cr></lf></cr>