本篇文章是对PHP中的堆栈与列队进行了详细的分析介绍,需要的朋友参考下
在PHP中数组常被当作堆栈(后进先出:LIFO)与队列(先进先出:FIFO)结构来使用。PHP提供了一组函数可以用于push与pop(堆栈)还有shift与unshift(队列)来操作数组元素。堆栈与列队在实践中应用非常广泛。
我们可以先看下堆栈:
复制代码 代码如下:
$arr = array();
array_push($arr,'aaa');
array_push($arr,'bbb');
$arr.pop();
print_r($arr);
?>
如果你打算把数组作为队列来使用(FIFO),美国空间,你可以使用array_unshift()来增加元素,网站空间,使用array_shift()删除:
复制代码 代码如下:
$arr = array();
array_unshift($arr,'aaa');
array_unshift($arr,'bbb');
print_r($arr);
array_shift($arr);
print_r($arr);
?>
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