MatthiasMullie\Scrapbook\Adapters\Apc::deleteMulti PHP 메소드

    public function deleteMulti(array $keys)
    {
        // attempt to get locks for all items
        $locked = $this->lock($keys);
        $failed = array_diff($keys, $locked);
        $keys = array_intersect($keys, $locked);
        // only delete those where lock was acquired
        if ($keys) {
            /**
             * Contrary to the docs, apc_delete also accepts an array of
             * multiple keys to be deleted. Docs for apcu_delete are ok in this
             * regard.
             * But both are flawed in terms of return value in this case: an
             * array with failed keys is returned.
             *
             * @see http://php.net/manual/en/function.apc-delete.php
             *
             * @var string[]
             */
            $result = $this->apcu_delete($keys);
            $failed = array_merge($failed, $result);
            $this->unlock($keys);
        }
        $return = array();
        foreach ($keys as $key) {
            $return[$key] = !in_array($key, $failed);
            unset($this->expires[$key]);
        }
        return $return;
    }