Php:Http lib.php

<?
// Class stolen from ClueBOT :)
class http {
        private $ch;
        function data_encode($data, $keyprefix = "", $keypostfix = "") {
                assert( is_array($data) );
                $vars=null;
                foreach($data as $key=>$value) {
                        if(is_array($value)) $vars .= $this->data_encode($value, $keyprefix.$key.$keypostfix.urlencode("["), urlencode("]"));
                        else $vars .= $keyprefix.$key.$keypostfix."=".urlencode($value)."&";
                }
                return $vars;
        }
 
        function __construct(){
                $this->ch = curl_init();
      			$this->cookie_file = 'cookie.txt';
				curl_setopt($this->ch, CURLOPT_COOKIEFILE, $this->cookie_file);
				curl_setopt($this->ch, CURLOPT_COOKIEJAR, $this->cookie_file);	
				curl_setopt($this->ch, CURLOPT_USERAGENT, "Mozilla/5.0 (X11; U; Linux i686; it; rv:1.9.0.1) Gecko/2008072820 Firefox/3.0.1");
				#"Mozilla/5.0 (X11; U; Linux i686; it; rv:1.8.1.3) Gecko/20060601 Firefox/2.0.0.4 (Ubuntu-edgy)");
                curl_setopt($this->ch,CURLOPT_MAXCONNECTS,100);
                curl_setopt($this->ch,CURLOPT_CLOSEPOLICY,CURLCLOSEPOLICY_LEAST_RECENTLY_USED);
        }
 
        function post($url,$data) {
                curl_setopt($this->ch,CURLOPT_URL,$url);
                curl_setopt($this->ch,CURLOPT_FOLLOWLOCATION,True);
                curl_setopt($this->ch,CURLOPT_MAXREDIRS,10);
                curl_setopt($this->ch,CURLOPT_HEADER,0);
                curl_setopt($this->ch,CURLOPT_RETURNTRANSFER,1);
                curl_setopt($this->ch,CURLOPT_TIMEOUT,30);
                curl_setopt($this->ch,CURLOPT_CONNECTTIMEOUT,10);
                curl_setopt($this->ch,CURLOPT_POST,True);
                curl_setopt($this->ch,CURLOPT_POSTFIELDS, substr($this->data_encode($data), 0, -1) );
                return curl_exec($this->ch);
        }
 
        function get($url){
                curl_setopt($this->ch,CURLOPT_URL,$url);
                curl_setopt($this->ch,CURLOPT_FOLLOWLOCATION,True);
                curl_setopt($this->ch,CURLOPT_MAXREDIRS,10);
                curl_setopt($this->ch,CURLOPT_HEADER,0);
                curl_setopt($this->ch,CURLOPT_RETURNTRANSFER,1);
                curl_setopt($this->ch,CURLOPT_TIMEOUT,30);
                curl_setopt($this->ch,CURLOPT_CONNECTTIMEOUT,10);
                curl_setopt($this->ch,CURLOPT_HTTPGET,1);
                return curl_exec($this->ch);
        }
 
        function __destruct(){
                curl_close($this->ch);
                @unlink($this->$cookie_file);
        }
}
?>