Twig

phil/slug-bundle

The filter is registered when Twig is installed. It keeps the phil_ prefix so that it does not clash with the slug filter of twig/string-extra.

Filter	Arguments	Gives
`phil_slug`	`slugger` (optional): the name of a slugger	The slug of the text, by that slugger or the default one

{{ 'Jeux de rôle'|phil_slug }}                       {# jeux-de-role #}
{{ "L'Ordre du Corbeau"|phil_slug('directory') }}    {# ordre-du-corbeau, with leading_words [l, …] #}

A text with nothing to make a slug of ('?!') and null give an empty string: a class name or a sort key is better empty than an error page.
An unknown slugger name is an error (UnknownSlugger): it is a mistake in the template, not in the data.