<?php
/**
 * 类名：SocketPOPClient
 * 功能：POP3 协议客户端的基本操作类
 * 作者：heiyeluren <http://blog.csdn.net/heiyeshuwu>
 * 时间：2006-7-3
 * 参考：RFC 2449, Uebimiau
 * 授权：BSD License
 */

class SocketPOPClient
{
    var $strMessage        = '';
    var $intErrorNum    = 0;
    var $bolDebug        = false;
    
    var $strEmail        = '';
    var $strPasswd        = '';
    var $strHost        = '';
    var $intPort        = 110;
    var $intConnSecond    = 30;
    var $intBuffSize    = 8192;

    var $resHandler        = NULL;
    var $bolIsLogin        = false;
    var $strRequest        = '';
    var $strResponse    = '';
    var $arrRequest        = array();
    var $arrResponse    = array();

    //---------------
    // 基础操作
    //---------------

    //构造函数
    function SocketPOP3Client($strLoginEmail, $strLoginPasswd, $strPopHost='', $intPort='')
    {
        $this->strEmail        = trim(strtolower($strLoginEmail));
        $this->strPasswd    = trim($strLoginPasswd);
        $this->strHost        = trim(strtolower($strPopHost));

        if ($this->strEmail=='' || $this->strPasswd=='')
        {
            $this->setMessage('Email address or Passwd is empty', 1001);
            return false;
        }
        if (!preg_match("/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/i", $this->strEmail))
        {
            $this->setMessage('Email address invalid', 1002);
            return false;
        }
        if ($this->strHost=='')
        {
            $this->strHost = substr(strrchr($this->strEmail, "@"), 1);
        }
        if ($intPort!='')
        {
            $this->intPort = $intPort;
        }
        $this->connectHost();
    }
    
    //连接服务器
    function connectHost()
    {
        if ($this->bolDebug)
        {
            echo "Connection ".$this->strHost." ...\r\n";
        }
        if (!$this->getIsConnect())
        {
            if ($this->strHost=='' || $this->intPort=='')
            {
                $this->setMessage('POP3 host or Port is empty', 1003);
                return false;            
            }
            $this->resHandler = @fsockopen($this->strHost, $this->intPort, &$this->intErrorNum, &$this->strMessage, $this->intConnSecond);
            if (!$this->resHandler)
            {
                $strErrMsg = 'Connection POP3 host: '.$this->strHost.' failed';
                $intErrNum = 2001;
                $this->setMessage($strErrMsg, $intErrNum);
                return false;
            }
            $this->getLineResponse();
            if (!$this->getRestIsSucceed())
            {
                return false;
            }
        }
        return true;
    }

    //关闭连接
    function closeHost()
    {
        if ($this->resHandler)
        {
            fclose($this->resHandler);
        }
        return true;
    }

    //发送指令
    function sendCommand($strCommand)
    {
        if ($this->bolDebug)
        {
            if (!preg_match("/PASS/", $strCommand))
            {
                echo "Send Command: ".$strCommand."\r\n";
            }
            else
            {
                echo "Send Command: PASS ******\r\n";
            }

        }
        if (!$this->getIsConnect())
        {
            return false;
        }
        if (trim($strCommand)=='')
        {
            $this->setMessage('Request command is empty', 1004);
            return false;
        }
        $this->strRequest = $strCommand."\r\n";
        $this->arrRequest[] = $strCommand;
        fputs($this->resHandler, $this->strRequest);
        return true;
    }

    //提取响应信息第一行
    function getLineResponse()
    {
        if (!$this->getIsConnect())
        {
            return false;
        }
   

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