socket编程 for PHP

以前经常在C/C++里面遇到socket，没想到PHP也有这样的功能，使用他内部的函数也可以进行远程通信，下面讲一下客户端的实例，包括 create,connect,send,recv,

<?php 
class ClientSocket {
    var $host;
    var $port;
    var $socket;
    var $errCode;
    var $errDesc;
    function __construct($host,$port) {
        $this->errCode  = 0;
        $this->errDesc   = '';
        $this->socket  = NULL;
        $this->host   = $host;
        $this->port   = $port;
        $this->init();
    }
    private function close() {
        socket_close($this->socket);
        $this->socket = NULL;
    }
    function SetErrMsg($code,$desc) {
        $this->errCode = $code;
        $this->errDesc = 'Warning:'.$desc.'<br>Message:'.socket_strerror(socket_last_error($this->socket));
    }
    function init() {
        $this->socket = @socket_create(AF_INET,SOCK_STREAM,SOL_TCP);
        if($this->socket == NULL) {
            $this->SetErrMsg(1,'Create socket failed');
            $this->sckServer = NULL;
            return false;
        }
        $result = @socket_connect($this->socket, $this->host, $this->port);
        if($result == false) {
            $this->SetErrMsg(2,'Connect server failed');
            $this->close();
            return false;
        }
    }
    function send($sendBuf) {
        $result = @socket_write($this->socket,$sendBuf,strlen($sendBuf));
        if($result == false) {
            $this->SetErrMsg(3,'Send data failed');
            return false;
        }
        return true;
    }
    function recv(){
        $recv='';
        while($recvBuf = @socket_read($this->socket,8129)){
            $recv .= $recvBuf;
        }
        return $recv;
    }
}
$header = "GET / HTTP/1.0/r/n";
$header.= "Host: 127.0.0.1/r/n";
$header.= "User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)";
$haeder.= "Accept: */*/r/n";
$header.= "Cookie: /r/n";
$header.= "Accept-Language: zh-cn,zh;/r/n";
$header.= "Connection: Close/r/n/r/n";
$client = new ClientSocket('127.0.0.1',80);
if($client->errCode!=0){
    echo $client->errDesc;
    exit;
}
$client->send($header);
$html = $client->recv();
$client->close();
echo $html;
?>

新手小刀，还望指点。。。。