Application

<?php
class Application {

    /** @var Database_Adapter **/
    public $db = NULL;

    /** @var Cache **/
    public static $cache = NULL;

    /** @var Request **/
    public $request = NULL;

    /** @var array **/
    public $params = array();

   public $begin_mem, $begin_time, $end_mem, $end_time;

    /**
    * @return Cache
    **/
    public static function cache()
    {
        return self::$cache;
    }

    /**
     * Initier l'application.
     * @throws Exception
     * @param array $conf
     * @return bool
     */
    public function init()
    {
        global $application;
        $config = new Config();
    $application->begin_time = $application->microtime_float();
    $application->begin_mem = memory_get_usage();
        $this->ConnectDatabase();
        self::$cache = new Cache;
        self::$cache->init();
    //  User::init();
    //  set_exception_handler(array('Error', 'handle'));
        //self::$request = Request::instance();
        return TRUE;
    }

    private function ConnectDatabase(){
        global $database;
        $database->getPDO();
    }

    /** @return null **/
    public function run()
    {
        global $application;
        Router::init();
        //self::$request->init();
        ob_start();
        Router::dispatch();
        $content = ob_get_clean();
        $application->end_time = $application->microtime_float();
        $application->end_mem = memory_get_usage();
        include_once ROOT.'layouts/ocean.php';
    }

    protected function convert($size)
    {
        $unit=array('B','Kb','Mb','Gb','Tb','Pb');
        return @round($size/pow(1024,($i=floor(log($size,1024)))),2).' '.$unit[$i];
    }

    /** @return string **/

        function microtime_float() {
            list($usec, $sec) = explode(" ", microtime());
            return ((float)$usec + (float)$sec);
        }

    public  function stats()
    {
            global $application;
            $time = round($application->end_time - $application->begin_time, 4);
            $mem = $application->convert($application->end_mem);
        return "Page généré en $time s, $mem de mémoire utilisé.";
    }
}