利用Curl、socket、file_get_contents POST数据

/**  
* Socket版本  
* 使用方法：  
* $post_string = "app=socket&version=beta";  
* request_by_socket('facebook.cn','/restServer.php',$post_string);  
*/  
function request_by_socket($remote_server,$remote_path,$post_string,$port = 80,$timeout = 30){   
    $socket = fsockopen($remote_server,$port,$errno,$errstr,$timeout);   
    if (!$socket) die("$errstr($errno)");   
      
    fwrite($socket,"POST $remote_path HTTP/1.0");   
    fwrite($socket,"User-Agent: Socket Example");   
    fwrite($socket,"HOST: $remote_server");   
    fwrite($socket,"Content-type: application/x-www-form-urlencoded");   
    fwrite($socket,"Content-length: ".strlen($post_string)+8."");   
    fwrite($socket,"Accept:*/*");   
    fwrite($socket,"");   
    fwrite($socket,"mypost=$post_string");   
    fwrite($socket,"");   
      
    $header = "";   
    while ($str = trim(fgets($socket,4096))) {   
        $header.=$str;   
    }   
      
    $data = "";   
    while (!feof($socket)) {   
        $data .= fgets($socket,4096);   
    }   
      
    return $data;   
}   
  
  
/**   
* Curl版本   
* 使用方法：   
* $post_string = "app=request&version=beta";   
* request_by_curl('http://facebook.cn/restServer.php',$post_string);   
*/   
function request_by_curl($remote_server,$post_string){   
    $ch = curl_init();   
    curl_setopt($ch,CURLOPT_URL,$remote_server);   
    curl_setopt($ch,CURLOPT_POSTFIELDS,'mypost='.$post_string);   
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);   
    curl_setopt($ch,CURLOPT_USERAGENT,"Jimmy's CURL Example beta");   
    $data = curl_exec($ch);   
    curl_close($ch);   
    return $data;   
}   
/**  
* 其它版本  
* 使用方法：  
* $post_string = "app=request&version=beta";  
* request_by_other('http://facebook.cn/restServer.php',$post_string);  
*/  
function request_by_other($remote_server,$post_string){   
    $context = array(   
        'http'=>array(  
            'method'=>'POST',  
            'header'=>'Content-type: application/x-www-form-urlencoded'."".  
                      'User-Agent : Jimmy's POST Example beta'."".   
                      'Content-length: '.strlen($post_string)+8,   
            'content'=>'mypost='.$post_string)   
        );   
    $stream_context = stream_context_create($context);   
    $data = file_get_contents($remote_server,FALSE,$stream_context);   
    return $data;   
}