php利用SMTP发送邮件代码

利用smtp发送电子邮件的代码。修改相关参数后，运行sendmail.php即可。不需配置php.ini 文件。

声明：本代码仅在www.163.com 和 www.tom.com  测试通过，hotmail 和　yahoo不支持SMTP功能，故不可以实现。感兴趣者可以试试啊... lucas 2007.11.08

1、sendmail.php

<?
 require_once("./SMTP.Class.inc.php");
 $smtpserver = "smtp.163.com";                                              //SMTP服务器
 $smtpserverport = 25;                                                                //SMTP服务器端口
 $smtpusermail = "[e-mail]";                     //SMTP服务器的用户邮箱
 $smtpemailto = "[e-mail]";                          //发送给谁
 $smtpuser = "dengxiao0120";                                                 //SMTP服务器的用户帐号 （发送者的邮箱）
 $smtppass = "198121";                                                           //SMTP服务器的用户密码（发送者的邮箱密码）
 $mailsubject = "hello world";                                                 //邮件主题 

  $mailbody = "This is a test mail from liuxueping.";            //邮件内容 

 $mailtype = "TXT";                                                                     //邮件格式（HTML/TXT）,TXT为文本邮件
 $smtp1 = new smtp($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.
 $smtp1->debug = TRUE;         //是否显示发送的调试信息
 if($smtp1->sendmail($smtpemailto, $smtpusermail, $mailsubject, $mailbody, $mailtype)){
    echo "邮件发送成功!";
 }
 else{
    echo "邮件发送失败!";
 }
?> 

2、SMTP.Class.inc.php  发送邮件类

<?
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 = ereg_replace("(^|(/r/n))(/.)", "/1./3", $body);
 $header= "MIME-Version:1.0/r/n";

 if($mailtype=="HTML"){
  $header .= "Content-Type:text/html;charset=gb2312/r/n";
  $header .= "Content-Transfer-Encoding: base64/n/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());
 $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)));
 }

 $this->Headers = $header;
 $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) {
 $domain = ereg_replace("^.+@([^@]+)$", "/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) {
        return $message; 
    }        
}

} 
?>