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时间:大约一个多小时

代码:200来行？

博客:1

知识点:php

<?php
class Smtp
{
    var $smtp_port;
    var $time_out;
    var $host_name;
    var $log_file;
    var $relay_host;
    var $debug;
    var $auth;
    var $user;
    var $pass;
    var $sock;
    function smtp($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("(^|(rn))(.)", "1.3", $body);
        $header = "MIME-Version:1.0rn";
        if ($mailtype == "HTML") {$header .= "Content-Type:text/htmlrn";}
        $header .= "To: " . $to . "rn";
        if ($cc != "") {$header .= "Cc: " . $cc . "rn";}
        $header .= "From(www.jb51.net): $from<" . $from . ">rn";
        $header .= "Subject: " . $subject . "rn";
        $header .= $additional_headers;
        $header .= "Date: " . date("r") . "rn";
        $header .= "X-Mailer:By Redhat (PHP/" . phpversion() . ")rn";
        list ($msec, $sec) = explode(" ", microtime());
        $header .= "Message-ID: <" . date("YmdHis", $sec) . "." . ($msec * 1000000) . "." . $mail_from . ">rn";
        $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 hostn");
        }

        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");}

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

        if (!@ getmxrr($domain, $MXHOSTS)) {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 . "rn" . $body);

        $this->smtp_debug("> " . str_replace("rn", "n" . "> ", $header . "n> " . $body . "n> "));

        return true;
    }

    function smtp_eom()
    {
        fputs($this->sock, "rn.rn");

        $this->smtp_debug(". [EOM]n");

        return $this->smtp_ok();
    }

    function smtp_ok()
    {
        $response = str_replace("rn", "", fgets($this->sock, 512));

        $this->smtp_debug($response . "n");

        if (!ereg("^[23]", $response))
        {
            fputs($this->sock, "QUITrn");

            fgets($this->sock, 512);

            return false;
        }

        return true;
    }

    function smtp_putcmd($cmd, $arg = "")
    {
        if ($arg != "")
        {
            if ($cmd == "")$cmd = $arg;

            else $cmd = $cmd . " " . $arg;
        }

        fputs($this->sock, $cmd . "rn");

        $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"))) {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("([ trn])+", "", $address);

        $address = ereg_replace("^.*<(.+)>.*$", "1", $address);

        return $address;
    }

    function smtp_debug($message) {if ($this->debug) {echo $message . ";";}}
}
?>