This script helps migrate PrestaShop to PHP 7.3 (not supported in the official version).
This fixes common gotchas, but your shop may need adjustments, especially with some modules. Please please please, run this first on a versionned code base and in a development environment. I'm not responsible if you break your shop!
git clone https://github.com/aeyoll/prestashop-1.6-php-migration.git
cd prestashop-1.6-php-migration
cp * your-prestashop-dir
cd your-prestashop-dir
composer install
./migrate.sh