function download($url,$name,$hash){
		$ch = curl_init($url);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
		$data = curl_exec($ch);
		curl_close($ch);
		$mh = curl_multi_init();
		$active = null;
		curl_multi_add_handle($mh,$ch);
		do {
			$mrc = curl_multi_exec($mh, $active);
		} while ($mrc == CURLM_CALL_MULTI_PERFORM);
		while ($active && $mrc == CURLM_OK) {
			if (curl_multi_select($mh) != -1) {
				do {
					$mrc = curl_multi_exec($mh, $active);
				} while ($mrc == CURLM_CALL_MULTI_PERFORM);
			}
			header('Content-Description: File Transfer');
			header("Content-Disposition: attachment; filename=".$name);
			readfile(curl_multi_getcontent($ch));
			ob_clean();
			flush();
		}
		curl_multi_remove_handle($mh, $ch);
		curl_multi_close($mh);
	}