dev > backend sheet (php)

PHP

Use the latest version

• https://www.php.net/supported-versions.php

Use the PHP-FPM handler

• set up the right pool.d config : /etc/php/x.x/fpm/pool.d/www.conf
• usefull : https://spot13.com/pmcalculator/

Use opcache

OPcache improves PHP performance by storing precompiled script bytecode in shared memory, thereby removing the need for PHP to load and parse scripts on each request.

https://www.php.net/manual/en/book.opcache.php

• note : you must restart php-fpm after updating your project code so It might have a downtime of the backend for few seconds.

Use app caching ?

• A DB request is always the same in frontend, ie. no filters, search ...
• CPU heavy load : image resize, tables joins / databases

Queues

Queue are the best way to defer an operation in a non blocking way for the user.

Use queues when something take more time than a db request :

• the response is not needed immediately

For example :

• update a map position by user adress using an API call
• send notification after a change