URL to Link function Tweak

Hi, I have a function that finds all URLs in a string and converts them to links. This works perfectly if the URL has http or https, but when they don't and it creates a link, the link doesn't work right. So I need the function modified to add https:// to any links that do not have it. Here is the function: function makeUrltoLink($string) { // The Regular Expression filter $reg_pattern = "/(((http|https)\:\/\/)|(www\.))[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\:[0-9]+)?(\/\S*)?/"; // make the urls to hyperlinks return preg_replace($reg_pattern, '<a href="$0" style="color:#0000EE; text-decoration: underline;" target="_blank" rel="noopener noreferrer">$0</a>', $string); } Thanks!