PHP magic _ PHP Tutorial

PHP magic. PHP magic method 1, _ get _ set: Take Over object properties 2, _ call _ callStatic: control the use of php object methods 3, _ toString: convert a php object to a string 4, _ invoke: PHP magic method

1. _ get/_ set: take over the object property
2. _ call/_ callStatic: controls the use of php object methods.
3. _ toString: converts a php object to a string.
4. _ invoke: calls back this method when a php object is executed as a function.

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;    }}

$ Obj = new Object ();

$ Obj-> title = "Hello"; // when a value is assigned to an attribute that does not exist in an object, the _ set method is automatically called.

Echo $ Obj-> title; // when you read an attribute that does not exist in an object, it automatically calls the _ get method.

Echo $ Obj-> test ("hello", "123"); // when a method that does not exist in an object is called, The _ call method is automatically called.

Echo $ Obj: test1 ("hello1", "1234"); // when a static method does not exist in an object is called, The _ callStatic method is automatically called.

Echo $ Obj; // when an object is directly output (because the object cannot be output directly), The _ toString method is automatically called to convert the object to a string.

Echo $ Obj ("hello"); // when an object is used as a function, the _ invoke method is automatically called.

Lifecycle 1, _ get/_ set: Take Over object properties 2, _ call/_ callStatic: control the use of php object methods 3, _ toString: convert the php object to string 4, _ invoke :...