Jquery AJAX cross-domain proxy with php

<?php
$base_url = 'http://www.yoursite.com/api/';
$chamada  = explode('/', $_SERVER['PHP_SELF']);
$chamada  = $chamada[2]; // if this php file is in a subdirectory you may change this key
$url      = $base_url.$chamada;
$method   = (!empty($_POST)) ? 'post' : 'get';
 
$ch = curl_init();
 
if ($method == 'get')
{
  if ($_SERVER['QUERY_STRING']) $url .= '?' . $_SERVER['QUERY_STRING'];
 
  curl_setopt($ch, CURLOPT_HEADER, 0);
  curl_setopt($ch, CURLOPT_URL, $url);
}
else
{
  curl_setopt($ch, CURLOPT_POST, true);
  curl_setopt($ch, CURLOPT_POSTFIELDS, $_POST);
  curl_setopt($ch, CURLOPT_URL, $url);
}
 
$data = curl_exec($ch);
curl_close($ch);
?>
 
<!-- Example -->
$.get('proxy.php/my_api_call');
$.post('proxy.php/my_post_api', {id:user_id});