php

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🇺🇸

Original

English

🇨🇳

Translation

Chinese

PHP

A popular specific-purpose scripting language that is especially suited to web development.

一种广受欢迎的专用脚本语言，尤其适用于Web开发。

When to Use

适用场景

Server-side web development
WordPress / CMS development
Content-heavy sites
Rapid prototyping

服务器端Web开发
WordPress / CMS开发
内容密集型网站
快速原型开发

Quick Start

快速开始

php

<?php
$name = "World";
echo "Hello, $name!";

$colors = ["red", "green", "blue"];
foreach ($colors as $color) {
    echo $color . "<br>";
}
?>

php

<?php
$name = "World";
echo "Hello, $name!";

$colors = ["red", "green", "blue"];
foreach ($colors as $color) {
    echo $color . "<br>";
}
?>

Core Concepts

核心概念

Arrays

数组

PHP arrays are versatile (serve as lists, maps, stacks, etc.).

php

$user = [
    "id" => 1,
    "name" => "Foo"
];

PHP数组用途广泛（可作为列表、映射、栈等使用）。

php

$user = [
    "id" => 1,
    "name" => "Foo"
];

Superglobals

超全局变量

Built-in variables available in all scopes (

$_GET

$_POST

$_SESSION

在所有作用域中都可用的内置变量（

$_GET

、

$_POST

、

$_SESSION

）。

OOP

面向对象编程（OOP）

PHP 8+ has robust object-oriented features including properties, attributes, and match expressions.

PHP 8+具备强大的面向对象特性，包括属性、attributes和匹配表达式。

Best Practices

最佳实践

Do:

Use Composer for dependency management
Type hint function arguments and return types
Use PDO for database access (prepared statements)
Follow PSR standards (PSR-12)

Don't:

Use
```
mysql_
```
functions (deprecated/removed)
Trust user input (sanitize/validate)
leave
```
display_errors
```
on in production

建议：

使用Composer进行依赖管理
为函数参数和返回值添加类型提示
使用PDO进行数据库访问（预处理语句）
遵循PSR标准（PSR-12）

不建议：

使用
```
mysql_
```
系列函数（已废弃/移除）
信任用户输入（需进行过滤/验证）
在生产环境中开启
```
display_errors
```

php