PHP magic method_PHP tutorial

PHP’s magic method

1. __get/__set: taking over object attributes
2. __call/__callStatic: Control the use of php object methods
3. __toString: Convert php object into string
4. __invoke: Call this method when executing a php object as a function

<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>

$Obj = new Object();

$Obj->title = "Hello";//When assigning a value to an object that does not exist, it will automatically call the __set method

echo $Obj->title;//When reading an attribute that does not exist in an object, it will automatically call the __get method

echo $Obj->test("hello","123"); //When calling a method that does not exist on an object, the __call method will be automatically called

echo $Obj::test1("hello1","1234"); //When calling a static method that does not exist in the object, the __callStatic method will be automatically called

echo $Obj;//When an object is output directly (because the object cannot be output directly), the __toString method will be automatically called to convert the object into a string

echo $Obj(“hello”);//When an object is used as a function, the __invoke method will be automatically called

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