Re: [PECL-DEV] Callling callbacks

On Wed, 21 Apr 2010 21:23:10 +0100, Stanislav Malyshev <[email protected]>  
wrote:

> Hi!
>
>> What is the best way to have a function accept an arbitrary callback (be
>> it a string, array or closure in case of PHP 5.3) that is compatible
>> with PHP 5.2 and 5.3?
>
> In 5.3+, you should use "f" parameter character. Unfortunately, in 5.2  
> there was none, so you'd probably have to have different code in 5.2  
> branch.
>

Apparently, the "f" parameters character also exists in 5.2, it simply  
wasn't used in the standard extension.

However, I'm starting to think I shouldn't use the "f" parameter. I don't  
want to call the callback immediately (before returning) so my initial  
approach was to store zend_fcall_info (and its function_name zval) and  
zend_fcall_info_cache. Well, in 5.2 I couldn't get it to work. If I did  
something like

func(array(new A(), 'method'))

the object of type A would be destroyed by the time the callback was  
called and the data in zend_fcall_info(_cache) would be outdated (in  
particular fic(_cache).object_pp would point to nowhere). I suppose you  
could fiddle with the refcounts, but it made me think that storing  
zend_fcall_info(_cache) was not the correct approach.

So which is it? Accepting the callback as a zval*, increment its refcount  
and store it and then creating zend_fcall_info(_cache) on each callback  
execution using zend_fcall_info_init?

Thanks

-- 
Gustavo Lopes