linkify tool um urls in text in echte links zu verwandeln

string.php

@@ -257,4 +257,8 @@ function onlySimpleHTML($s) {
 
   return $s;
 }
+function linkify($input) {
+  $pattern = '@(http(s)?://)?(([a-zA-Z])([-\w]+\.)+([^\s\.]+[^\s]*)+[^,.\s])@';
+  return $output = preg_replace ( $pattern, '<a href="http$2://$3">$0</a>', $input );
+}
 ?>