php - 有什么方法可以神奇地调用所有类的方法？

Question

我已经查看了 PHP 魔术方法，但至少从这些方法中看不到任何方法来实现这一点。

我希望在实例化任何类时“神奇地”调用一个方法，例如__onClassCall()，它没有专门写在类中 - 这将用于调试，我想打开或关闭它.同样，我想在调用类中的任何方法时触发另一个方法，该方法也可以写在其他地方并打开或关闭。这可能吗？

Answer 1

您可能希望自己实现这些。 __invoke() 魔术方法可能不是您需要的，因为无论如何您仍然必须显式触发它。考虑下面的代码，其中您有一个 MagicHelper 类，其中您声明了您的魔术方法，然后在您的类中使用它们（此处：SomeClassOne）。这可能不是内置的 PHP 函数，但这就是 OOP 的全部内容，对吧？

    <?php

        class MagicHelper{

            public static function __onClassCall(){
                // LOGIC FOR SOME SPECIAL INITIALIZATION ON THE INSTANTIATION OF A CLASS OBJECT GOES HERE...
                // THIS METHOD IS FIRED EACH TIME AN OBJECT IS INSTANTIATED
            }

            public static function __onMethodCall(){
                // LOGIC FOR DEBUGGING GOES HERE...
                // THIS METHOD IS FIRED EACH TIME A METHOD IS CALLED
            }
        }


        class SomeClassOne{
            private $prop;

            public static $CLASS_PREP_ENABLED       = true; //<== COULD BE TURNED OFF OR ON
            public static $METHOD_DEBUG_ENABLED     = true; //<== COULD BE TURNED OFF OR ON

            public function __construct($prop = null) {
                $this->prop     = $prop;

                if(self::$CLASS_PREP_ENABLED){
                    // CALL THE STATIC MAGIC __onClassCall METHOD DECLARED IN THE MagicHelper CLASS
                    // EACH TIME A NEW OBJECT IS INSTANTIATED
                    MagicHelper::__onClassCall();
                }
            }

            function __invoke() {
                // YOU COULD AS WELL USE THIS BUT I DOUBT THIS FITS YOUR DESCRIPTION.
            }

            public function getProp() {
                return $this->prop;
            }

            public function setProp($prop) {
                $this->prop = $prop;
                return $this;
            }

            public function methodOne($paramOne){
                // THE LOGIC FOR THIS METHOD GOES HERE
                //...
                // CALL THE STATIC MAGIC __onMethodCall METHOD DECLARED IN THE MagicHelper CLASS
                // EACH TIME A NEW OBJECT IS INSTANTIATED
                if(self::$METHOD_DEBUG_ENABLED) {
                    MagicHelper::__onMethodCall();
                }

            }

            public function methodTwo($paramTwo){
                // THE LOGIC FOR THIS METHOD GOES HERE
                //...
                // CALL THE STATIC MAGIC __onMethodCall METHOD DECLARED IN THE MagicHelper CLASS
                // EACH TIME A NEW OBJECT IS INSTANTIATED
                if(self::$METHOD_DEBUG_ENABLED) {
                    MagicHelper::__onMethodCall();
                }
            }
        }