diff --git a/string.php b/string.php
index b96111c..33ef3d1 100644
--- a/string.php
+++ b/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 );
+}
 ?>
\ No newline at end of file