MatthiasMullie\Scrapbook\Buffered\Utils\Transaction::decrement PHP Method

    public function decrement($key, $offset = 1, $initial = 0, $expire = 0)
    {
        if ($offset <= 0 || $initial < 0) {
            return false;
        }
        // get existing value (from real cache or memory) so we know what to
        // increment in memory (where we may not have anything yet, so we should
        // adjust our initial value to what's already in real cache)
        $value = $this->get($key);
        if ($value === false) {
            $value = $initial + $offset;
        }
        if (!is_numeric($value) || !is_numeric($offset)) {
            return false;
        }
        // store the value in memory, so that when we ask for it again later
        // in this same request, we get the value we just set
        $value = max(0, $value - $offset);
        $success = $this->local->set($key, $value, $expire);
        if ($success === false) {
            return false;
        }
        $this->defer->decrement($key, $offset, $initial, $expire);
        return $value;
    }

 /**
  * {@inheritdoc}
  */
 public function decrement($key, $offset = 1, $initial = 0, $expire = 0)
 {
     $result = $this->transaction->decrement($key, $offset, $initial, $expire);
     $this->transaction->commit();
     return $result;
 }