如何在php中加载类中的动态变量

I have a problem to load dinamic configs in static class.

I have something like this:

class ololo {
public static $config = array(
    'time' => time(),
    'name' => 'zztop_'.mt_rand(1,1000)
    );
public static function getVar($name) {
    return self::$config[$name];
}
}

How should i do to make it work? I have many dynamic vars and i cant load it in __construct.

I want everytime i call a getVar have new value to show. Something like:

echo ololo::getVar('name');
echo ololo::getVar('name');
echo ololo::getVar('name');

zztop_1
zztop_222
zztop_11