link-url.php

<?php
//Function definations
function MakeUrls($str)
{
$find=array('`((?:https?|ftp)://\S+[[:alnum:]]/?)`si','`((?<!//)(www\.\S+[[:alnum:]]/?))`si');

$replace=array('<a href="$1" target="_blank">$1</a>', '<a href="http://$1" target="_blank">$1</a>');

return preg_replace($find,$replace,$str);
}
//Function testing
$str="aaa test www.cloudlibz.com https://stackoverflow.com  www.writephponline.com/";
$str=MakeUrls($str);
echo $str;
?>

convert the url to link in php text object