e107inc/e107

<?php
/**
 * Execute callbacks before Codeception does
 */

class PriorityCallbacks
{
    /** @var array */
    private $shutdown_functions = [];

    private function __construct()
    {
        register_shutdown_function([$this, 'call_shutdown_functions']);
    }

    public static function instance()
    {
        static $instance = null;
        if (!$instance instanceof self)
        {
            $instance = new static();
        }
        return $instance;
    }

    public function call_shutdown_functions()
    {
        foreach ($this->shutdown_functions as $shutdown_function)
        {
            call_user_func($shutdown_function);
        }
    }

    public function register_shutdown_function($callable)
    {
        $this->shutdown_functions[] = $callable;
    }

    public function __clone() {}

    public function __sleep() {}

    public function __wakeup() {}
}

PriorityCallbacks::instance();