php实现队列

<?phpclass Queue{public $queue;public function __construct(){$this->queue=array();}public function queue_in($data){$this->queue[]=$data;}public function queue_out(){return array_shift($this->queue);}}$queue=new Queue();for($i=0;$i<11;$i++){$queue->queue_in($i);}for($i=0;$i<11;$i++){echo $queue->queue_out()."<br>";}