This expression escapes characters, which have a special meaning in regex, like .?[]/ and so on. Use it to transform a string that you want to use literally in another regex. This is the second version, bug in replace string has been fixed.

Matches subdomain, domain and top level in a field that contains a urls. https://www.whatever.you.want ---> whatever.you.want

auto prefix ("/") to folder

To check whether the given String contains 3 or more consecutive single digit numbers

Evaluates a string such that only letters, digits, and the special characters !, #, and $ are allowed. Length 8 - 64

Remove leading "http://" or "https://" and optionally a "www." for look up

Matches a HTML5/custom element valid tag format .

the source log of asa cisco firewall is not RFC formatted this regex (java) match all globaly