略微加速

PHP官方手册 - 互联网笔记

PHP - Manual: Ds\Stack::peek

2024-12-21

Ds\Stack::peek

(PECL ds >= 1.0.0)

Ds\Stack::peekReturns the value at the top of the stack

说明

public Ds\Stack::peek(): mixed

Returns the value at the top of the stack, but does not remove it.

参数

此函数没有参数。

返回值

The value at the top of the stack.

错误/异常

UnderflowException if empty.

范例

示例 #1 Ds\Stack::peek() example

<?php
$stack 
= new \Ds\Stack();

$stack->push("a");
$stack->push("b");
$stack->push("c");

var_dump($stack->peek());
?>

以上例程的输出类似于:

string(1) "c"
add a noteadd a note

User Contributed Notes

There are no user contributed notes for this page.

官方地址:https://www.php.net/manual/en/ds-stack.peek.php

北京半月雨文化科技有限公司.版权所有 京ICP备12026184号-3