[PATCH] unregister_shutdown_function()

Hi,

This patch implements unregister_shutdown_function(), which removes a
function already registered with register_shutdown_function().

It resolves request #53702 (according to google, not sure if it's
still active) and I've thought it a curious absence for a while.

The patch (against trunk) is at:
http://spellign.com/patches/php-trunk-unregister_shutdown_function.patch

N.B. I don't return from the apply func with ZEND_HASH_APPLY_STOP when
it matches because it's also possible to register the same function
twice (maybe a bug?)

Regards,

Arpad

2011/6/20 Johannes Schlüter johannes@schlueters.de:

(any reason you sent this privately?)

Nope, must have hit the wrong button ;) back to the list now.

2011/6/20 Johannes Schlüter johannes@schlueters.de:

Why do you register a shutdown function if you want to remove it again?
Shouldn't you fix the architecture of your code instead of relying on
such functions?

Hi,

The use case for this function is where you don't control the
registration of the shutdown function and you want to remove it, for
example the framework you're using does it.

Then fix the framework or use a better one.

I'm inclined to agree, just providing an implementation. If it's not wanted, ok.

Does register_shutdown_function() work with closures? (Didn't test it)
Then the following should work, too, which isn't the case in your code:

   $a = function() {};
   register_shutdown_function($a);
   unregister_shutdown_function($a);

Thanks for pointing this out, I've updated it to support closures,
which also simplifies the patch a bit:

Good.

http://spellign.com/patches/php-trunk-unregister_shutdown_function2.patch

I also think once that functionality is there the next request will be

   get_registered_shutdown_functions()

or something along the lines.

I don't see of what use that could be.

Completeness? "Has that stupid shutdown func been registered?"

Fair enough, although I should point out that
unregister_shutdown_function() returns false if the function hadn't
been registered, so if the aim of checking whether it's registered is
to remove it then that's unnecessary.

Regards,

Arpad