splqueue.inc

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<?php

class SplQueue extends SplDoublyLinkedList
{
    protected $_it_mode = parent::IT_MODE_FIFO;

    public function setIteratorMode($mode)
    {
        if ($mode & parent::IT_MODE_LIFO === parent::IT_MODE_LIFO) {
            throw new RuntimeException("Iterators' LIFO/FIFO modes for SplStack/SplQueue objects are frozen");
        }

        $this->_it_mode = $mode;
    }

    public function dequeue()
    {
        return parent::shift();
    }

    public function enqueue($data)
    {
        return parent::push($data);
    }
}

?>