PHP中使用数组实现堆栈数据结构的代码
在堆栈中，最后压入的数据（进栈），将会被最先弹出（出栈）。
即在数据存储时采用“先进后出”的数据结构。
PHP中，将数组当做一个栈，主要是使用array_push()和array_pop()两个系统函数来完成。
入栈主要是利用array_push()函数向第一个参数的数组尾部添加一个或多个元素，然后返回新数组的长度，示例如下：
复制代码 代码如下:
$zhan=array("WEB");//声明一个数组当做栈
array_push($zhan,"PHP");//将字符串压入栈（数组）中
array_push($zhan,"WWW.CHHUA.COM");//再压入一个元素
print_r($zhan);//打印数组内容
?>
出栈主要是利用array_pop()函数将数组的最后一个函数弹出，并将数组的长度减1，示例如下：
复制代码 代码如下:
$zhan=array("WEB","www.chhua.com","WEB开发笔记","PHP","网站建设");//声明一个数组当做栈
array_pop($zhan);//将字符串出栈（数组）中
print_r($zhan);//打印数组内容 Array([0] => WEB[1] => www.chhua.com[2] => WEB开发笔记[3] => PHP)
?>
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