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Fix error when save preferences on Prestashop with PHP7

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PHP 7 makes powering your Prestashop website a whole lot better and to the next level. Your website will run very fast for deployment on a server with PHP5. Unfortunately, there are some small errors if you use Prestashop with php7. This tutorial will show you how to fix the error when save preferences in BO.

Fix error when save preferences on Prestashop with PHP7

PHP7 or PHP5 ?

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 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 Drupal 8.0.1

PHP7 vs PHP 5.6 vs HHVM on Magento 2.0 CE

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.

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.

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