Articles
- https://kinsta.com/blog/10-things-not-to-do-in-php-7/
- https://www.cloudways.com/blog/php-7-upgrade-guide/
- https://www.php.net/manual/en/migration70.php
- https://blog.fortrabbit.com/php-testing
- https://auth0.com/blog/migrating-a-php5-app-to-7-part-three/
- https://medium.com/@isaacjoe/alert-upgrade-your-php-from-5-to-7-in-2-months-deadline-in-2018-12-31-df6b68411160
PHP 5 to 7.2 upgrade
- https://www.php.net/supported-versions.php
- https://blog.fortrabbit.com/on-php-deadlines
- https://github.com/phan/phan