<?php
$text = 'hello http://google.com world!';
?>
function is_url($url) {
return preg_match('|^http(s)?://[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(/.*)?$|i', $url);
}
if ( !is_url($url) ) echo 'URL not valid';
