Work with the php CURL

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There's a very good class for it which I regularly use. This class wasn't written by me, but its working very well

<?php
/*
Sean Huber CURL library

This library is a basic implementation of CURL capabilities.
It works in most modern versions of IE and FF.

==================================== USAGE ====================================
It exports the CURL object globally, so set a callback with setCallback($func).
(Use setCallback(array('class_name', 'func_name')) to set a callback as a func
that lies within a different class)
Then use one of the CURL request methods:

get($url);
post($url, $vars); vars is a urlencoded string in query string format.

Your callback function will then be called with 1 argument, the response text.
If a callback is not defined, your request will return the response text.
*/

class CURL {
   var $callback = false;

function setCallback($func_name) {
   $this->callback = $func_name;
}

function doRequest($method, $url, $vars) {
   $ch = curl_init();
   curl_setopt($ch, CURLOPT_URL, $url);
   curl_setopt($ch, CURLOPT_HEADER, 1);
   curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
   curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
   curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookie.txt');
   curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookie.txt');
   if ($method == 'POST') {
       curl_setopt($ch, CURLOPT_POST, 1);
       curl_setopt($ch, CURLOPT_POSTFIELDS, $vars);
   }
   $data = curl_exec($ch);
   curl_close($ch);
   if ($data) {
       if ($this->callback)
       {
           $callback = $this->callback;
           $this->callback = false;
           return call_user_func($callback, $data);
       } else {
           return $data;
       }
   } else {
       return curl_error($ch);
   }
}

function get($url) {
   return $this->doRequest('GET', $url, 'NULL');
}

function post($url, $vars) {
   return $this->doRequest('POST', $url, $vars);
}
}
?>

PHP:

A code example:

<?
// Include the cURL class
include("curl.class.php");
// Initialize cURL library
$curl = new CURL;

// The vars
$vars = "variable1=blabla&variable2=anothervalue";
// POST it
$result = $curl->post("http://www.someurl.com/submit/to/this/url.php", $vars);
// or rather GET it?
$result = $curl->get("http://www.anotherurl.com/get.php?" . $vars);
?>

PHP:

Hope this helps