The current ECT 7.5.x cart versions run just fine on PHP 8.2.1, which is actually the latest available. PHP 8.0/8.1 are fine too, although imo they are something you should be updating from, not to
Peter
Professional ecommerce web hosting services Shared hosting Windows & Linux | Dedicated servers | Domains | SSL Ecommerce Templates specialists since 2003 https://servelink.com
If you are going from that old version of .php, then it's likely you need to review this post. https://www.ecommercetemplates.com/support/topic.asp?TOPIC_ID=107737
quote:They upgraded to 8.1 but the admin threw an error. So they backed down again to 5.6
The reason your client encountered an error upon upgrading the PHP version is that the default set of PHP Extensions applied by cPanel are not adequate.