curl asynchrone pool

<?php
  $url = 'https://www.google.com';
	$curl = curl_init();
	curl_setopt($curl, CURLOPT_URL, $url);
	curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($curl, CURLOPT_TIMEOUT, 30);
	curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
	$result = curl_exec($curl);
	curl_close($curl);
	echo $result;
?>