php smtp send email

php通过smtp发送邮件需要通过一个类smtp

发邮件的代码如下：

require_once 'smtp.php';

##########################################
$smtpserver = "smtp.sina.com";//SMTP服务器
$smtpserverport = 25;//SMTP服务器端口
$smtpusermail = "god_chen@sina.com";//SMTP服务器的用户邮箱
$smtpemailto = "45323333@qq.com";//发送给谁
$smtpuser = "name";//SMTP服务器的用户帐号
$smtppass = "123456";//SMTP服务器的用户密码
$mailsubject = "中文";//邮件主题
$mailbody = "中文测试下能淤泥新年感";//邮件内容
$mailtype = "HTML";//邮件格式（HTML/TXT）,TXT为文本邮件
##########################################
$smtp = new smtp($smtpserver,$smtpserverport,true,$smtpuser,$smtppass);//这里面的一个true是表示使用身份验证,否则不使用身份验证.
$smtp->debug = FALSE;//是否显示发送的调试信息
$smtp->sendmail($smtpemailto, $smtpusermail, $mailsubject, $mailbody, $mailtype)

smtp类的源码如下：

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 $this->smtp_error("sending . [EOM]");
        }
        if (!$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;
}
}

}

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