<?php
function txt2link($text){
// force http: on www.
$text = preg_replace( "www\.", "http://www.", $text );
// eliminate duplicates after force
$text = preg_replace( "http://http://www\.", "http://www.", $text );
$text = preg_replace( "https://http://www\.", "https://www.", $text );
// The Regular Expression filter
$reg_exUrl = "/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";
// Check if there is a url in the text
if(preg_match($reg_exUrl, $text, $url)) {
// make the urls hyper links
$text = preg_replace($reg_exUrl, '<a href="'.$url[0].'" rel="nofollow">'.$url[0].'</a>', $text);
} // if no urls in the text just return the text
return ($text);
}
echo txt2link('http://www.snoodo.com');