PHP：当继承的类调用父函数时记录或跟踪

Question

I'm in the process of trying to track outdated or unused functions inside an object class. One idea I had was to create a new class that inherits that original class, and then "track" when that parent's functions are called. When detected, I will migrate the parent's function into the child until eventually only the necessary/needed functions exist.

Is there code that does this automatically within PHP? Here is in example.

class OldUser {
    function getFullName() {
        return "{$this->firstName} {$this->lastName}";
    }
}

class User extends OldUser {

}

-----

$user = new User;
echo $user->getFulLName();

---

Then in a log somewhere I note: "{timestamp} function getFullName() called"

Obviously I could add these logs manually, but if there is an existing way for PHP to do it I'd love to default to that methodology.

Alternatively, if there is a better way to do this I am open to suggestions.

Thanks!

Answer 1

All you need to do from there is implement all of the public methods of OldUser and have those calls trigger the logging and then call the parent function. eg:

class User extends OldUser {
    protected function log($method, $backtrace) {
        // ...
    }
    public function getFullName() {
        $this->log(__METHOD__, debug_backtrace());
        return parent::getFullName();
    }
}

debug_backtrace() will allow you to track down where in the code that the function was called.