Prestashop PHP 7: Fix error while saving preferences

It's a simple question. PHP7 is faster than PHP5 and at the same level with HHVM ( HHVM is an open-source virtual machine designed for executing programs written in Hack and PHP, a son of Facebook team). Here are some benchmark between PHP7, HHVM and PHP5:

PHP7 vs HHVM on Wordpress 4.4

PHP7 vs PHP 5.6 vs HHVM on Drupal 8.0.1

PHP7 vs PHP 5.6 vs HHVM on Magento 2.0 CE

Prestashop not fully support PHP7 - that's why we don't have the benchmark on Prestashop. However, you can be sure that with PHP7, your Prestashop site will run very fast.

Prestashop PHP 7: Fix the error

When you try to customize your website's preferences, you will get the following errors on many screens:

PHP Fatal error:  Uncaught Error: Access to undeclared static property: Validate::$values in /your-root-folder/classes/controller/AdminController.php:1389

We need to open the above file and replace all of this type :

Validate::$values['property']

by

Validate::{$values['property']}

Your problem will be fixed and you could depoy a Prestashop website on PHP7.