Doing POST Request by Socket Connection

<?php           
// submit these variables to the server
$post_data = array("test"=>"yes", "passed"=>"yes", "id"=>"3");
 
// send a request to specified server
$result = do_post_request("http://www.example.com/", $post_data); 
if($result["status"] == "ok"){ 
    // headers 
    echo $result["header"]; 
    // result of the request
    echo $result["content"]; 
}else{
    echo "An error occurred: ".$result["error"]; 
}
 
function do_post_request($url, $data, $referer = ""){
    // convert the data array into URL Parameters like a=1&b=2 etc.
    $data = http_build_query($data);
    // parse the given URL
    $url = parse_url($url); 
 
    if($url["scheme"] != "http"){ 
        die("Error: only HTTP requests supported!");
    }
 
    // extract host and path from url
    $host = $url["host"];
    $path = $url["path"];
 
    // open a socket connection with port 80, set timeout 40 sec.
    $fp = fsockopen($host, 80, $errno, $errstr, 40);
    $result = "";
 
    if($fp){ 
        // send a request headers
        fputs($fp, "POST $path HTTP/1.1\r\n");
        fputs($fp, "Host: $host\r\n"); 
        if($referer != "") fputs($fp, "Referer: $referer\r\n"); 
        fputs($fp, "Content-type: application/x-www-form-urlencode
d\r\n");
        fputs($fp, "Content-length: ".strlen($data)."\r\n");
        fputs($fp, "Connection: close\r\n\r\n");
        fputs($fp, $data); 
 
        // receive result from request
        while(!feof($fp)) $result .= fgets($fp, 128);
    }else{ 
        return array("status"=>"err", "error"=>"$errstr ($errno)");
    }
 
    // close socket connection
    fclose($fp);
 
    // split result header from the content
    $result = explode("\r\n\r\n", $result, 2);
 
    $header = isset($result[0]) ? $result[0] : "";
    $content = isset($result[1]) ? $result[1] : "";
 
    // return as structured array:
    return array(
        "status" => "ok",
        "header" => $header,
        "content" => $content
    );
}
 
?>