JavaScript and PHP custom functions that convert URL addresses in text into clickable links_javascript skills

When writing a small program these days, I need to use regular expressions to match the URL address in the text input by the user, and then replace the URL address with a clickable link. URL address matching, I think this should be something that everyone often uses in verification processing. Here is a relatively complete expression that I integrated:

Copy code The code is as follows:

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 URL addresses of http, https, ftp, ftps and IP addresses. It is still a relatively complete URL address matching calculation. Using this expression, I wrote two small functions to replace the URL address of the user's message with a clickable link. There is nothing too difficult. Just use JavaScript's replace() function to replace the URL with link:

JavaScript version:

Copy code The code is as follows:

/**
*JavaScript version
* Convert URL address into 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:

Copy code The code is as follows:

/**
* PHP version modified based on Silva code
* Convert URL address into 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;
}