Hi,
The messages:
Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /home/test5/test.com/plugins/content/responsivelightbox/responsivelightbox.php on line 22
Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /home/test5/test.com/plugins/content/retinaimages/retinaimages.php on line 22
come from the responsivelightbox and retinaimages content plugins you have installed on your website. These are not from us nor from Joomla. I suppose the version of them you're using is not fully compatible with PHP 8
You must have had these messages even before updating your HikaShop.
As for
Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/test5/test.com/libraries/vendor/joomla/registry/src/Format/Json.php on line 54
I can't say where this comes from.
It basically means that something is trying to use the JSON library of Joomla in a way it shouldn't on PHP 8.
So it could come from any plugin of the groups system, hikashop, content, etc.
Note however that these deprecated messages are not real errors. They are there so that developers can change their code as it won't work properly in future versions of php. On a live website, you should have the "error reporting" setting of the Joomla configuration configured in a way that doesn't display them. Not only because they are not real errors, but also for security reasons.
HIKASHOP ESSENTIAL 60€The basic version. With the main features for a little shop.
HIKAMARKETAdd-on Create a multivendor platform. Enable many vendors on your website.
HIKASERIALAdd-on Sale e-tickets, vouchers, gift certificates, serial numbers and more!
MARKETPLACEPlugins, modules and other kinds of integrations for HikaShop
