PHP: friend classes and ungreedy caller function/class

Question

Is there any way to get the caller function with something else than debug_backtrace()?

I'm looking for a less greedy way to simulate scopes like friend or internal.

Let's say I have a class A and a class B.

Until now, I've been using debug_backtrace(), which is too greedy (IMHO).

I thought of something like this:

<?php

    class A
    {
        public function __construct(B $callerObj) {}
    }

    class B
    {
        public function someMethod()
        {
            $obj = new A($this);
        }
    }
?>

It might be OK if you want to limit it to one specific class, but let's say I have 300 classes, and I want to limit it to 25 of them?

One way could be using an interface to aggregate:

public function __construct(CallerInterface $callerObj)

But it's still an ugly code.

Moreover, you can't use that trick with static classes.

Have any better idea?

Answer 1

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Answer 2

PHP really doesn't provide you an elegant way of handling this. Without meaning to start a language flamewar, I'm going to gingerly suggest that your design skills and needs have probably exceeded the limitations of your tool. PHP is a lightweight scripting language that's had a lot of pseudo-OOP features bolted onto it, but at its core, it wasn't ever designed for elegant enterprise architecture.