<?php
class 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 = preg_replace("/(^|(\r\n))(\.)/", "\1.\3", $body);
        //$string = ereg_replace(' value', ' ', trim($string));　if(eregi('^('value', $value)
        //$string = preg_replace('{ value}', ' ', trim($string));

        $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: $from<".$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: <".date("YmdHis", $sec).".".($msec*1000000).".".$mail_from.">\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)) {

                $this->log_write("E-mail has been sent to <".$rcpt_to.">\n");

            } else {

                $this->log_write("Error: Cannot send email to <".$rcpt_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 (!$this->smtp_putcmd("MAIL", "FROM:<".$from.">")) {

            return $this->smtp_error("sending MAIL FROM command");

        }

        if (!$this->smtp_putcmd("RCPT", "TO:<".$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)

    {

        $domain = preg_replace("^.+@([^@]+)$", "\1", $address);

        if (!@getmxrr($domain, $MXHOSTS)) {

            $this->log_write("Error: Cannot resolve MX \"".$domain."\"\n");

            return FALSE;

        }
//专注与php学习 http://www.daixiaorui.com 欢迎您的访问

        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 (!preg_match("/^[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 (preg_match('/'.$comment.'/', $address)) {

            $address =  preg_replace($comment, "", $address);

        }


        return $address;

    }


    function get_address($address)

    {

        $address =  preg_replace("/([ \t\r\n])+/", "", $address);

        $address =  preg_replace("/^.*<(.+)>.*$/", "\1", $address);

        return $address;

    }

    function smtp_debug($message)

    {

        if ($this->debug) {

            echo $message;

        }

    }

}

?>