PHP object-oriented overloading

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

Example

// 属性的重载 class Person { public $name = '小芳'; protected $age = 18; public function __get($n) { //echo '试图读取不可访问的属性'.$n; if( $n == 'age'){ return $this -> age; }else{ return '你要查户口吗？'; } } public function __set($n,$v) { //echo '试图设置不可访问的属性','
'; $this -> $n = $v; } public function __isset($n) { echo '判断不可访问的属性'.$n.'是否存在','
'; } public function __unset($n) { echo '销毁不可访问的属性'.$n,'
'; } } $p1 = new Person(); // 读取 //echo $p1 -> age,'
'; //echo $p1 -> xxx,'
'; // 设置 //$p1 -> age = 30; //echo $p1 -> age,'
'; // 判断存在与否 isset($p1 -> age); // 销毁 unset($p1 -> age);

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

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

Example

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

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