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Date: Mon, 3 Aug 2015 12:52:06 +0200
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To: Rowan Collins <rowan.collins@gmail.com>
Cc: "internals@lists.php.net" <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=001a1136cbd812a0fc051c65f7a1
Subject: Re: [PHP-DEV] Exposing object handles to userland
From: nicolas.grekas+php@gmail.com (Nicolas Grekas)

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Content-Type: text/plain; charset=UTF-8

> So, yes, just to make it more human friendly. In which case, the actual
> value doesn't matter, and rather than reverse-engineering the hash, you
> could just make up your own ID:
>
> function my_object_id($obj) {
>     static $hash_to_id=[];
>     $hash = spl_object_hash($obj);
>     if ( ! array_key_exists($hash, $hash_to_id) ) {
>         $hash_to_id[$hash] = count( $hash_to_id);
>     }
>     return $hash_to_id[$hash];
> }
>


Yep, that would work, but with the following drawbacks:
- it would create a memory leak/overhead
- more importantly for users, these ids couldn't be compared to var_dumps'.

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