Title: PHP deprecated warnings
Last modified: May 4, 2026

---

# PHP deprecated warnings

 *  [Guillermo](https://wordpress.org/support/users/guillermo77/)
 * (@guillermo77)
 * [2 weeks, 5 days ago](https://wordpress.org/support/topic/php-deprecated-warnings-6/)
 * Hi, I’m getting PHP deprecated warnings with PHP 8.4:
 * Sabberworm\CSS\Parser::__construct(): Implicitly marking parameter as nullable
   is deprecated
 * It comes from:
   vendor/sabberworm/php-css-parser
 * Looks like the library needs explicit nullable types for PHP 8.1+ compatibility.
 * Thanks!

You must be [logged in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fphp-deprecated-warnings-6%2F%3Foutput_format%3Dmd&locale=en_US)
to reply to this topic.

 * ![](https://s.w.org/plugins/geopattern-icon/debloat.svg)
 * [Debloat - Remove Unused CSS, Optimize JS](https://wordpress.org/plugins/debloat/)
 * [Support Threads](https://wordpress.org/support/plugin/debloat/)
 * [Active Topics](https://wordpress.org/support/plugin/debloat/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/debloat/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/debloat/reviews/)

 * 0 replies
 * 1 participant
 * Last reply from: [Guillermo](https://wordpress.org/support/users/guillermo77/)
 * Last activity: [2 weeks, 5 days ago](https://wordpress.org/support/topic/php-deprecated-warnings-6/)
 * Status: not a support question