yii\debug\LogTarget::gc PHP Метод

    protected function gc(&$manifest)
    {
        if (count($manifest) > $this->module->historySize + 10) {
            $n = count($manifest) - $this->module->historySize;
            foreach (array_keys($manifest) as $tag) {
                $file = $this->module->dataPath . "/{$tag}.data";
                @unlink($file);
                unset($manifest[$tag]);
                if (--$n <= 0) {
                    break;
                }
            }
        }
    }