php的数组索引是从0开始,而不是1.
$states[0] //普通数组可以用序号作为键$states['aa'] //关联数组用键值对来调用$states['aa']['aaa'] //多为数组可以通过这种方式来调用
-
php中无论使用关联数组还是数值键,都是依赖于一种数组指针的特性,数组指针就如同书签,告诉你正在检查的数组位。
-
你并不是直接操作数组指针,而是使用内置的语言特性或函数来遍历数组
-
这里的意思就是在php里面,所有的数组管理方法其实都是在操作数组指针,只是操作指针的方法都是php内置好或者被函数封装好的。
创建数组
直接创建
$states[0] = 1;$states[] = 1;$states['aa'] = 1;
用array()创建数组
$languages = array('spain'=>'spanish','ireland'=>'english');
用list提取数组
文件users.txt内容a|b|c$users = fopen('users.txt','r');while($line = fgets($users,4096)){ list($name,$sex,$age) = explode("|",$line); //通过explode将|作为分隔符,然后分成3份,然后再用list将这3份分别代入到3个变量里面}echo $name;echo $sex;echo $age;
用range来生成数组
$test = range(1,6); //生成值为1到6的6个元素的数组$test = range(1,10,2); //第三个参数是步长,步长就是大概是间隔的意思,这里生成 1 3 5 。。。。间隔为2的值
测试数组
用is_array来测试,返回true和false
打印数组
用print_r来打印
print_r($states); //遍历打印数组

Long URLs, often cluttered with keywords and tracking parameters, can deter visitors. A URL shortening script offers a solution, creating concise links ideal for social media and other platforms. These scripts are valuable for individual websites a

Following its high-profile acquisition by Facebook in 2012, Instagram adopted two sets of APIs for third-party use. These are the Instagram Graph API and the Instagram Basic Display API.As a developer building an app that requires information from a

Laravel simplifies handling temporary session data using its intuitive flash methods. This is perfect for displaying brief messages, alerts, or notifications within your application. Data persists only for the subsequent request by default: $request-

This is the second and final part of the series on building a React application with a Laravel back-end. In the first part of the series, we created a RESTful API using Laravel for a basic product-listing application. In this tutorial, we will be dev

Laravel provides concise HTTP response simulation syntax, simplifying HTTP interaction testing. This approach significantly reduces code redundancy while making your test simulation more intuitive. The basic implementation provides a variety of response type shortcuts: use Illuminate\Support\Facades\Http; Http::fake([ 'google.com' => 'Hello World', 'github.com' => ['foo' => 'bar'], 'forge.laravel.com' =>

The PHP Client URL (cURL) extension is a powerful tool for developers, enabling seamless interaction with remote servers and REST APIs. By leveraging libcurl, a well-respected multi-protocol file transfer library, PHP cURL facilitates efficient execution of various network protocols, including HTTP, HTTPS, and FTP. This extension offers granular control over HTTP requests, supports multiple concurrent operations, and provides built-in security features.

Do you want to provide real-time, instant solutions to your customers' most pressing problems? Live chat lets you have real-time conversations with customers and resolve their problems instantly. It allows you to provide faster service to your custom

The 2025 PHP Landscape Survey investigates current PHP development trends. It explores framework usage, deployment methods, and challenges, aiming to provide insights for developers and businesses. The survey anticipates growth in modern PHP versio


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Zend Studio 13.0.1
Powerful PHP integrated development environment

SublimeText3 Chinese version
Chinese version, very easy to use

SublimeText3 Linux new version
SublimeText3 Linux latest version

Notepad++7.3.1
Easy-to-use and free code editor

Dreamweaver CS6
Visual web development tools
