How to use (preg_replace) replace the symbol "/"

Twig requires escaping backward slashes.

{{ '50/01'|preg_replace('/\\//','') }}

If you change regexp delimiters you won't need to escape anything.

{{ '50/01'|preg_replace('#/#','') }}

Also note that preg_replace is intended for processing strings through regular expressions. In your case it's better to use simple replace filter from Twig core.

{{ '50/01'|replace({'/': ''}) }}

I know replace filter, However, my use case requires matching of some strings:

{{ '50/01'|preg_replace('/^(11|12|31|50)\\/(01|02)$/','$1') }}

Thank you, It works normally.

Automatically closed - issue fixed for 2 weeks with no activity.