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PHP的魔术方法

Jun 21, 2016 am 08:46 AM
function param return

1、__get/__set:对对象属性的接管
2、__call/__callStatic:控制php对象方法的使用
3、__toString:将php对象转换成字符串
4、__invoke:将一个php对象当成函数来执行时来回调这个方法

<code>class Object
{
 protected $array = array();

    function __set($key,$value)
    {
        var_dump(__METHOD__);
        $this->array[$key] = $value;
    }
    function __get($key)
    {
        var_dump(__METHOD__);
        return $this->array[$key];
    }

    function __call($func,$param)
    {
        var_dump($func,$param);
        return magic mathod __call;
    }

    static function __callStatic($func,$param)
    {
        var_dump($func,$param);
        return magic mathod __callStatic;
    }

    function __toString()
    {
        return __toString;
    }

    function __invoke($param)
    {
        var_dump($param);
        return invoke;
    }
}
</code>
Copy after login

$Obj = new Object();

$Obj->title = “你好”;//当对一个对象不存在的属性赋值的时候,它就会自动调用__set方法

echo $Obj->title;//对去读取一个对象不存在的属性的时候,它就会自动调用__get方法

echo $Obj->test(“hello”,”123”); //当调用一个对象不存在的方法时,就会自动调用__call方法

echo $Obj::test1(“hello1”,”1234”); //当调用一个对象不存在的静态方法时,就会自动调用__callStatic方法

echo $Obj;//当直接输出一个对象时(因为对象不能直接输出),就会自动调用__toString方法把对象转换成字符串

echo $Obj(“hello”);//当将一个对象当成一个函数来使用的时候,就会自动调用__invoke方法



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