php 常用class

<?php
class User {
    // 属性
    public $name;
    public $email;

    // 构造函数
    public function __construct($name, $email) {
        $this->name = $name;
        $this->email = $email;
    }

    // 方法
    public function greet() {
        return "Hello, my name is " . $this->name . " and my email is " . $this->email;
    }
}

// 创建User类的实例
$user = new User("Alice", "alice@example.com");

// 调用greet方法
echo $user->greet();
?>

class Example {
    private $property; // 确保属性存在

    public function __construct($value) {
        $this->property = $value; // 正确设置属性值
    }

    public function getPropertyValue() { // 确保方法是公共的
        return $this->property;
    }
}

class ParentClass {
    public function parentMethod() {
        echo "This is a method in the parent class.";
    }
}

class ChildClass extends ParentClass {
    public function childMethod() {
        echo "This is a method in the child class.";
    }
}

$child = new ChildClass();
$child->parentMethod(); // 调用父类方法
$child->childMethod(); // 调用子类方法