php Socket发送电子邮箱来验证邮箱的真实有效性而非格式

<?php


set_time_limit(120);
class smtp_mail
{
var $host; //主机
var $port; //端口 一般为25
var $user; //SMTP认证的帐号
var $pass; //认证密码
var $debug = false; //是否显示和服务器会话信息？
var $conn;
var $result_str; //结果
var $in; //客户机发送的命令
var $from; //源信箱
var $to; //目标信箱
var $subject; //主题
var $body; //内容
function smtp_mail($host,$port,$user,$pass,$debug=false)
{
 $this->host = $host;
 $this->port = $port;
 $this->user = base64_encode($user);
 $this->pass = base64_encode($pass);
 $this->debug = $debug;
 $this->socket = socket_create (AF_INET, SOCK_STREAM, SOL_TCP); //具体用法请参考手册
if($this->socket)
{
 $this->result_str ="创建SOCKET:".socket_strerror(socket_last_error());
$this->debug_show($this->result_str);
}
else
{
exit("初始化失败，请检查您的网络连接和参数");
}
 $this->conn = socket_connect($this->socket,$this->host,$this->port);
if($this->conn)
{
 $this->result_str ="创建SOCKET连接:".socket_strerror(socket_last_error());
$this->debug_show($this->result_str);
}
else
{
exit("初始化失败，请检查您的网络连接和参数");
}
 $this->result_str ="服务器应答：<font color=#cc0000>".socket_read ($this->socket, 1024)."</font>";
$this->debug_show($this->result_str);


}
function debug_show($str)
{
if($this->debug)
{
 echo $str."<p>rn";
}
}
function send($from,$to,$subject,$body)
{
 if($from ==""|| $to =="")
{
exit("请输入信箱地址");
}
 if($subject =="") $sebject ="无标题";
 if($body =="") $body ="无内容";
 $this->from = $from;
 $this->to = $to;
 $this->subject = $subject;
 $this->body = $body;

//扬帆修改部分代码
 $All ="From:<".$this->from.">rn";
 $All .="To:<".$this->to.">rn";
 $All .="Subject:".$this->subject."rnrn";
 $All .= $this->body;



//以下是和服务器会话
 $this->in ="EHLO HELOrn";
$this->docommand();

 $this->in ="AUTH LOGINrn";
$this->docommand();

 $this->in = $this->user."rn";
$this->docommand();

 $this->in = $this->pass."rn";
$this->docommand();

// $this->in ="MAIL FROM:".$this->from."rn";
 $this->in ="MAIL FROM:<".$this->from.">rn"; //扬帆修改
$this->docommand();

// $this->in ="RCPT TO:".$this->to."rn";
 $this->in ="RCPT TO:<".$this->to.">rn"; //扬帆修改
$this->docommand();

 $this->in ="DATArn";
$this->docommand();

 $this->in = $All."rn.rn";
$this->docommand();

 $this->in ="QUITrn";
$this->docommand();

//结束，关闭连接



}
function docommand()
{
 socket_write ($this->socket, $this->in, strlen ($this->in));
$this->debug_show("客户机命令：".$this->in);
 $this->result_str ="服务器应答：<font color=#cc0000>".socket_read ($this->socket, 1024)."</font>";
$this->debug_show($this->result_str);
}
}
?>

<?php
//测试页面
include"smtp_mail.php";

//你用这个类的时候你修改成你自己的信箱就可以了
$smtp=new smtp_mail("smtp.qq.com","25","yourmail@qq.com","Your password",true);
//如果你需要显示会话信息，请将上面的修改成
//$smtp = new smtp_mail("smtp.qq.com","25","你的qq.com的帐号","你的密码",true);
$smtp->send("yourmail@qq.com","yourmail@qq.com","你好","测试邮件");
?>