PHP类用静态方法，挂钩之前

Question

I have the following class in PHP with all static methods:

class Foo {
    public static function a {
    }

    public static function b {
    }

    public static function c {
    }

    public static function d {
    }

    public static function e {
    }
}

Is there a way to create a hook to fire before calling any of the methods in class Foo i.e. like a before hook? I need some logic, and don't want to have to add that logic to every static function like:

class Foo {
    private static function init() {
        // pre logic here
    }

    public static function a {
        Foo::init();
    }

    public static function b {
        Foo::init();
    }

    public static function c {
        Foo::init();
    }

    public static function d {
        Foo::init();
    }

    public static function e {
        Foo::init();
    }
}

Answer 1

What you want is called an Aspect-Oriented Programming. It allows to define an advice before method call, property access, class initialization, etc.

However, this technique is not used widely in PHP due to its complexity. I can suggest your an example with Go! AOP Framework.

class AutoInitializationAspect implements Aspect
{

    /**
     * This advice intercepts an execution of static methods
     *
     * We use "Before" type of advice to initialize the state
     *
     * @param MethodInvocation $invocation Invocation
     *
     * @Before("execution(public Foo::*(*))", scope="target")
     */
    public function beforeMethodExecution(MethodInvocation $invocation)
    {
        $class = $invocation->getThis(); // will be the class name
        $class::init(); // access to the private scope of class
    }
}

Visit http://demo.aopphp.com/?showcase=loggable for demo (see LoggingDemo::runByName() static method intercepted)