" . $m[0] . ""; } else { // url return "".$m[0].""; } } function linkifyMyString($noteText) { $emailPattern = '\S+@\S+\.\S+'; $urlPattern = '(https?)?(://)?([a-zA-Z](?:[-\w]+\.)+(?:[^\s.]+\S*)+[^,.\s])'; return preg_replace_callback('~' . $emailPattern . '|' . $urlPattern . '~', 'replace_callback', $noteText); } $str = "www.google.com contact me at test.me@gmail.com visit us http://google.com ,http://g...content-available-to-author-only...l.com"; echo linkifyMyString($str);