Hello,
@Drack, thank you for this report, updated.
The ClicShopping Core seems to work fine with php 7.4, just the external libraries must be updated eventually, for that we must wait the developer to make the work.
If I see something, I will update the core.
There, the elements can put eventually a problem after a quick search (I do not say, you will have an error, more test must be again done) :
base on this information : https://www.php.net/manual/fr/migration74.deprecated.php
Using array_key_exists() on objects (some external libraries) ¶
Magic quotes functions (ckeditor) ==> no impact