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PHP object-oriented overloading

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Release： 2023-03-29 22:22:01

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This article mainly introduces the object-oriented overloading of PHP, which has certain reference value. Now I share it with you. Friends in need can refer to it.

Definition:

1 ) dynamically "creates" the properties and methods of a class.

2) Achieved through magic method.

3) When calling a property or method of a class that is undefined or invisible in the current environment, the overloaded method will be called.

Attribute overloading

__set      赋值

__get      读取

__isset    判断是否存在

__unset    销毁

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Example

// 属性的重载
class Person
{
    public $name = &#39;小芳&#39;;
    protected $age = 18;

    public function __get($n)
    {
        //echo &#39;试图读取不可访问的属性&#39;.$n;

        if( $n == &#39;age&#39;){
            return $this -> age;
        }else{
            return &#39;你要查户口吗？&#39;;
        }
    }

    public function __set($n,$v)
    {
        //echo &#39;试图设置不可访问的属性&#39;,&#39;<br/>&#39;;
        $this -> $n = $v;
    }

    public function __isset($n)
    {
        echo &#39;判断不可访问的属性&#39;.$n.&#39;是否存在&#39;,&#39;<br/>&#39;;
    }

    public function __unset($n)
    {
        echo &#39;销毁不可访问的属性&#39;.$n,&#39;<br/>&#39;;
    }
}

$p1 = new Person();

// 读取
//echo $p1 -> age,&#39;<br/>&#39;;
//echo $p1 -> xxx,&#39;<br/>&#39;;

// 设置
//$p1 -> age = 30;
//echo $p1 -> age,&#39;<br/>&#39;;

// 判断存在与否
isset($p1 -> age);

// 销毁
unset($p1 -> age);

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Method overloading

__call         调用不可访问的普通方法

__callStatic   调用不可访问的静态方法

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Special note that when __callStatic is defined, it must be defined as a static method.

Example

<?php

class MyClass
{
    protected function func($n)
    {
        echo &#39;这是一个不可访问的方法&#39;;
        echo &#39;参数有&#39;.$n;
    }

    protected static function fun2()
    {
        echo &#39;受保护的静态方法&#39;;
    }

    public function __call($function_name,$args)
    {
        echo &#39;触发了不可访问的方法&#39;;
        var_dump($function_name);
        var_dump($args);
    }

    public static function __callStatic($function_name,$args)
    {
        echo &#39;触发了不可访问jing tai方法,静态！！！！&#39;;
        var_dump($function_name);
        var_dump($args);
    }
} 

// 实例化
$c1 = new MyClass();

$c1 -> func([1,2,3]);

$c1 -> func2([1,2,3]);

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Related recommendations:

php object-oriented encapsulation

##php Object-oriented magic methods

php object-oriented static methods, properties and constants

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