Examples of POST data using socket, curl, and file_get_contents methods

/**
* Socket version
* How to use:
* $post_string = "app=socket&version=beta";
* request_by_socket('www.1bo8.cn','/restServer.php',$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 $remote_path HTTP/1.0rn");
    fwrite($socket,"User-Agent: Socket Examplern");
    fwrite($socket,"HOST: $remote_serverrn");
    fwrite($socket,"Content-type: application/x-www-form-urlencodedrn");
    fwrite($socket,"Content-length: ".strlen($post_string)+8."rn");
    fwrite($socket,"Accept:*/*rn");
    fwrite($socket,"rn");
    fwrite($socket,"mypost=$post_stringrn");
    fwrite($socket,"rn");

    $header = "";
    while ($str = trim(fgets($socket,4096))) {
        $header.=$str;
    }

    $data = "";
    while (!feof($socket)) {
        $data .= fgets($socket,4096);
    }

    return $data;
}

/**
* Curl版本
* 使用方法：
* $post_string = "app=request&version=beta";
* request_by_curl('http://www.1bo8.cn/restServer.php',$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;
}
/**
* Other versions
* How to use:
* $post_string = "app=request&version=beta";
* request_by_other('http://www.1bo8.cn/restServer.php',$post_string);
*/
function request_by_other($remote_server,$post_string){
    $context = array(
        'http'=>array(
            'method'=>'POST',
            'header'=>'Content-type: application/x-www-form-urlencoded'."rn".
                      'User-Agent : Jimmy's POST Example beta'."rn".
                      'Content-length: '.strlen($post_string)+8,
            'content'=>'mypost='.$post_string)
        );
    $stream_context = stream_context_create($context);
    $data = file_get_contents($remote_server,FALSE,$stream_context);
    return $data;
}
?>