Modern PHP

Composer in WordPress plugins and themes Composer is the dependency manager of PHP. WordPress core does not use it, but in your own plugins and themes it saves copying libraries by hand: composer require downloads a library with its dependencies, and one autoloader loads all classes, the libraries’ and your own.

PHP 7 features worth using in WordPress code PHP 7.0 came out in December 2015 and was roughly twice as fast as PHP 5.6 on WordPress, but it also brought language features that make code shorter and clearer. WordPress itself still runs on PHP 5.2.4 and newer, so core cannot use them, but in your…