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HomeBackend DevelopmentPHP TutorialPHP使用数组实现队列(实际就是先进先出怎么实现)

PHP使用数组实现队列(实际就是先进先出如何实现)

PHP的数组处理函数还可以将数组实现队列,堆栈是“先进后出”。在堆栈中,最后压入的数据(进栈),将会被最先弹出(出栈)。而队列是先进先出,就如同银行的排号机


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:

而PHP中,将数组当作是队列则主要是用array_push()和array_shift()实现。
复制代码 代码如下:

$zhan=array("WEB");//声明一个数组当做队列
array_push($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_shift()函数将数组的第一个元素弹出,并将数组的长度减1,示例如下:
复制代码 代码如下:

$zhan=array("WEB","www.chhua.com","WEB开发笔记","PHP","网站建设");//声明一个数组当做栈
array_shift($zhan);//将字符串出队(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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