PHP利用Curl、socket、file_get_contents POST数据

/**
* 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){
    $context = array(
        'http'=>array(
            'method'=>'POST',
            'header'=>'Content-type: application/x-www-form-urlencoded'."/r/n".
                      'User-Agent : Jimmy/'s POST Example beta'."/r/n".
                      'Content-length: '.strlen($post_string)+8,
            'content'=>.$post_string)
         );
    $stream_context = stream_context_create($context);
    $data = file_get_contents($remote_server,FALSE,$stream_context);
     return $data;
}

 

/**
* 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 $remote_path HTTP/1.0/r/n");
    fwrite($socket,"User-Agent: Socket Example/r/n");
    fwrite($socket,"HOST: $remote_server/r/n");
    fwrite($socket,"Content-type: application/x-www-form-urlencoded/r/n");
    fwrite($socket,"Content-length: ".strlen($post_string)+8."/r/n");
    fwrite($socket,"Accept:*/*/r/n");
    fwrite($socket,"/r/n");
    fwrite($socket,"mypost=$post_string/r/n");
    fwrite($socket,"/r/n");
    
    $header = "";
     while ($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;
}