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Subject: zend_call_function() and co.
From: flavius.as@gmail.com (Flavius Aspra)

Hi

I have a few questions about zend_fcall_info and zend_fcall_info_cache.

Regarding zend_fcall_info

What is function_name useful for? I have a feeling it's for error 
reporting, but I'm not sure

What is symbol_table for? Maybe to put in the function's context other 
variables beside the parameters, like $this?

What is zend_fcall_info_cache for? I've seen in some places that 
zend_call_function() sometimes takes a NULL for it. When is it useful to 
cache information about the function call?


Regards,
Flavius