smarty user deprecation notices about php function 'implode'

[lmeyer1]

Prerequisites

• I understand and accept the project's code of conduct.
• I have already searched in existing issues and found no previous report of this bug.

Describe the bug and add attachments

I'm on a BO with debug enabled, I then edit a faceted search category.
This is the error message I get.

I get it only when the smarty cache is empty. It does not reproduce on reload of the page.

Related to #32703

Expected behavior

There should no usage of deprecated smarty features.

Steps to reproduce

On an installation with debug enabled (define('_PS_MODE_DEV_', true);) and ps_facetedsearch installed

• log into BO
• go to ps_facetedsearch configuration
• in "Filter models" click on "Create model" or edit an existing model
• Notice the error in a modal.
• If needed, empty the folder var/cache

PrestaShop version(s) where the bug happened

8.0.4

PHP version(s) where the bug happened

8.0

If your bug is related to a module, specify its name and its version

ps_facetedsearch (version not important, bug is in core)

Your company or customer's name goes here (if applicable).

Société Biblique de Genève

[aniszr]

Hello,

I managed to reproduce this issue with PS 8.0.4 and found same problem, in PS 1.7.8.9 I couldn't reproduce it.
It looks like a regression to me!
Nice catch 👍

Thanks