PHP two-way queue code

This article mainly introduces the PHP two-way queue, which has certain reference value. Now I share it with you. Friends in need can refer to it.

queue,$value); } /** * 尾部出队 * @return [type] [description] */ public function removeLast(){ return array_pop($this->queue); } /** * 头部入队 * @param [type] $value [description] */ public function addFirst($value){ return array_unshift($this->queue, $value); } /** * 头部出队 * @return [type] [description] */ public function removeFirst(){ return array_shift($this->queue); } /** * 清空队列 * @return [type] [description] */ public function makeEmpty(){ unset($this->queue); } /** * 获取列头 * @return [type] [description] */ public function getFirst(){ return reset($this->queue); } /** * 获取列尾 * @return [type] [description] */ public function getLast(){ return end($this->queue); } /** * 获取长度 * @return [type] [description] */ public function getLength(){ return count($this->queue); } }

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