Send POST request to a webpage from php and return the response

sendPost.php

<?php
/**
 * Author: Tony Brix, http://tonybrix.info
 * 
 * Send POST request to a webpage from php and return the response.
 * @param string $url The url of the webpage you would like to send the request to.
 * @param array $data The post data to send with the request.
 * @return string The response of the request
 */
function sendPost($url, $data) {

	$data_string = http_build_query($data);
	$opts = array("http" =>
		array(
			"method" => "POST",
			"header" => "Content-Type: application/x-www-form-urlencoded",
			"content" => $data_string
		)
	);
	$result = file_get_contents($url, false, stream_context_create($opts));

	return $result;
}