Is it possible to perform a RegEx match on a string in Twig?

I'm looking for something like this:

{% set string = "This is **string**. **wer**  qewr **234**" %}
{% set match  = string.matches(/([*][*])(.*)([*][*])/g) %}
  • 5
    This question is a better fit the on StackOverflow site. Commented Jun 16, 2014 at 12:55
  • 1
    I believe you'd have to extend twig for this. This looks like it has what you'd need, specifically the preg_get_all. If you're trying to bold that text though, there's a markdown filter that can do that for you. Commented Jun 16, 2014 at 13:47
  • 1
    Yes, your edit makes the question relevant to Craft. Commented Jun 16, 2014 at 14:42
  • 1
    Here's a preg_replace implementation in a Craft plugin: github.com/low/low_regex. This should give you a framework to build what you need. Nice if the 'on hold' comes off your original question, and good fortune. Commented Jun 16, 2014 at 17:43
  • 2
    To open the question we need one more vote to reopen it. It's beside the edit and flag link.
    – Victor
    Commented Jun 16, 2014 at 17:55

3 Answers 3


Currently Twig uses regular expressions only with Comparisons:

{% if string matches '{^[\d\.]+$}' %}
    Do Stuff
{% endif %}

Craft itself currently doesn't have any custom Twig filters or functions either.

But there are third-party plugins which might help you:


This works for me just fine:

{# Removes all characters other than numbers and + #}
{{ profile.phone|replace('/[^0-9+]/', '') }}

Answers for 2023 using Craft CMS 4

For simple find and replace: you can just use the replace filter, it accepts RegEx now.

For more complicated lookups: If you're looking to just add Craft CMS filters in general or use PHP filters, like preg_match_all() you can install the Twig Toolbox plugin, create the file config/twig-toolbox.php with the following code to enable the filter or add more as needed:

<?php return [
    'filters' => [
        'preg_match_all' => function(string $subject, string $pattern): array {
            preg_match_all($pattern, $subject, $matches, PREG_SET_ORDER);
            return $matches;
    'functions' => [],
    'globals' => [],
    'tests' => [],

Please note, the above filter is a basic version of the actual preg_match_all, see the full documentation and adapt as you see fit.

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