I have a variable in twig that is a string. I want to get a specific number from this and display only that number. So something like

 {{ this.theme.social_widget | regex(id="\d+(\.\d+)*(,\d+)?") }}

But from what I see Twig doesn't support this. Is there any other way around this?

Last updated 8 years ago

Twig has a 'replace' filter but it does not support regex patterns. But you can overwrite the filter with your own method. See this page for details on how to add your own twig filters https://octobercms.com/docs/plugin/registration#extending-twig

public function replaceFilter($str, $search, $replace = null)
    {
        // Are they using the standard Twig syntax?
        if (is_array($search) && $replace === null)
        {
            return strtr($str, $search);
        }
        // Is this a regular expression?
        else if (preg_match('/^\/.+\/[a-zA-Z]*$/', $search))
        {
            return preg_replace($search, $replace, $str);
        }
        else
        {
            // Otherwise use str_replace
            return str_replace($search, $replace, $str);
        }
    }

Thanks douglas14166, although twig doesn't support regex your answer is more than helpful :)

How do I pass the twig filter into my returnTwitter function?

So far I have..

public function registerMarkupTags()
{
    return [
        'filters' => [
            'twitterStrip' => [$this, 'returnTwitterID']
        ],

    ];
}

public function returnTwitterID($text)
{

}

// Twig filter I want to insert into the returnTwitterID function

$filter = new Twig_SimpleFilter('data_widget_id', function ($value) {
        $matches;
        if (preg_match('#data-widget-id="\d+(\.\d+)*(,\d+)?"#', $str, $matches)) return $matches[0];
        return $value;
    });

   $twig = new Twig_Environment($loader);
   $twig->addFilter($filter);

Hi you don't need to use Twig_whatever class!

 public function returnTwitterID($text){

      //do yourlogic here and return the value you want  your filter to compute.
 }

then in your html call

{{ 'mystirngto parse' | twitterStrip }}

Last updated 8 years ago

Hi octobro, did you solve the problem, i have the same and i dont know how to fix that !! I would appreciate your help

Why do you need that in Twig? Normally you want to display data provided by (busniess) models, so you could define an accessor that returns the correctly formatted value.

Can you describe your use case?

Last updated 8 years ago

I've created a plugin for adding regex functions to Twig: http://octobercms.com/plugin/luketowers-twigpcre

LukeTowers said:

I've created a plugin for adding regex functions to Twig: http://octobercms.com/plugin/luketowers-twigpcre

Nice!

I will check this one out when I get some time :)