what is autoload in PHP?
The blog post “PHP AutoLoad Best Practices” will be of help to you about the usage of autoload.
It’s a magic function that helps you include / require files using the class name.
function __autoload($class_name)
{
require_once $DOCUMENT_ROOT . "/classes/" . $class_name . ".php";
}
It’s deprecated in PHP 7.2.0, and now spl_autoload_register is recommended for this purpose.