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。。。。