Converts urls in text into clickable JavaScript and PHP custom functions

These days, when writing a small program, you need to use regular expressions to match the URL address in the user's input text, and then replace the URL address with a link that can be clicked. URL address matching, I think this should be everyone in the process of verification often used, here I put together a more complete expression:

var URL = /(https?://|ftps?://)?((d{1,3}.d{1,3}.d{1,3}.d{1,3})(:[0-9]+)?|(localhost)(:[0-9]+)?|([w]+.)(S+)(w{2,4})(:[0-9]+)?)(/?([w#!:.?+=&%@!-/]+))?/ig;

This expression can match the URL addresses of HTTP, HTTPS, FTP, FTPS, and IP addresses. Also is the URL address matching algorithm perfect. Using this expression, I wrote two small functions to replace the URL address left by the user with a clickable link. Nothing is too difficult, just use the JavaScript replace() function to replace the URL as link:

The JavaScript version:

/**

 * JavaScrit  version 

 *  will URL Convert the address to complete A Tag link code 

 */

var replaceURLToLink = function (text) {

        text = text.replace(URL, function (url) {

            var urlText = url;

            if (!url.match('^https?://')) {

                url = 'http://' + url;

            }

            return '' + urlText + '';

        });
        return text;

    };

PHP version:

/**

 * PHP  version   in  Silva  Code based on the modification 

 *  will URL Convert the address to complete A Tag link code 

 */

/** =============================================

 NAME        : replace_URLtolink()

 VERSION     : 1.0

 AUTHOR      : J de Silva

 DESCRIPTION : returns VOID; handles converting

 URLs into clickable links off a string.

 TYPE        : functions

 ============================================= */
function replace_URLtolink($text) {

    // grab anything that looks like a URL...

    $urls = array();

    

    // build the patterns

    $scheme = '(https?://|ftps?://)?';

    $www = '([w]+.)';

    $local = 'localhost';

    $ip = '(d{1,3}.d{1,3}.d{1,3}.d{1,3})';

    $name = '([w0-9]+)';

    $tld = '(w{2,4})';

    $port = '(:[0-9]+)?';

    $the_rest = '(/?([w#!:.?+=&%@!-/]+))?';

    $pattern = $scheme.'('.$ip.$port.'|'.$www.$name.$tld.$port.'|'.$local.$port.')'.$the_rest;

    $pattern = '/'.$pattern.'/is';

    

    // Get the URLs

    $c = preg_match_all($pattern, $text, $m);

    

    if ($c) {

        $urls = $m[0];

    }

    

    // Replace all the URLs

    if (! empty($urls)) {

        foreach ($urls as $url) {

            $pos = strpos('http://', $url);

            

            if (($pos && $pos != 0) || !$pos) {

                $fullurl = 'http://'.$url;

            } else {

                $fullurl = $url;

            }

            

            $link = ''.$url.'';

            

            $text = str_replace($url, $link, $text);

        }

    }

    

    return $text;

}