A new twig function which can fetch external URL via GET or POST and pass arbitrary parameters while fetching

fetch.php

<?php
//file: fetch.php
use Twig_Extension;
use Twig_Function_Method;
class Fetch extends Twig_Extension
{
    public function fetch ($url, $params=array())
    {
        if($url){
            $ch = curl_init($url);
            curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
            if(count($params)>0){
                curl_setopt($ch,CURLOPT_POST,1);
                curl_setopt($ch,CURLOPT_POSTFIELDS,$params);
            }
            $data = curl_exec($ch);
            curl_close($ch);
            return $data;
        }
    }

    public function getFunctions ()
    {
        return array(
            'fetch' => new Twig_Function_Method($this, 'fetch', array('is_safe' => array('html')))
        );
    }

    public function getName ()
    {
        return 'fetch';
    }
}