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PHP 8 - Uncaught Error: Call to undefined function str_contains() in...

Resolved

Reported for: WPML Multilingual CMS 4.6.8

Resolved in: WPML 4.6.10

Topic Tags: Bug

Overview of the issue

The introduction of the str_contains() function in PHP 8 may led to compatibility issues if the following two conditions are true:

  • PHP version used is lower than 8.
  • WordPress version installed is older than 5.9.

An error like the following will be triggered:

Fatal error: Uncaught Error: Call to undefined function str_contains() in .../wp-content/plugins/sitepress-multilingual-cms/classes/request-handling/wpml-request.class.php:123

Workaround

Please, make sure of having a full backup of your site before proceeding.

You can try to install the latest beta for WPML (v 4.6.10)

Or

Upgrade any (of both) of the following requirements:

  • PHP 8
  • WordPress version (+5.9).