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Date: Sun, 16 Nov 2008 22:16:03 +0800
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Subject: Re: [PHP-DEV] Can someone explain me why this happens please?
From: jiangcat@gmail.com (Chris Jiang)

Ok, I see. Thank you all for replying. I guess there are a lot to be 
learned for me now.

I'm actually trying to learn C and put it in use of writing PHP 
extensions. Because from years of working with PHP, I start to feel that 
PHP might be a bit weak for performance sensitive tasks.

Well, it's a long way ahead, and I'd better get going now. Thanks again 
for the help, and I'll send more 'spam' if I've got problem with PHP and 
Zend in the future. :D


M. Karpelès 写道:
> Le dimanche 16 novembre 2008 à 21:35 +0800, Chris Jiang a écrit :
>> Still, this is a really strange experience. Where are those characters 
>> come from? Shouldn't it be a clean array when I first created them? 
>> Anything related to the zval structure?
> 
> This is not PHP-related. When you *define* a variable, it has no
> content, you have to initialize it. The characters you got are from the
> uninitialized space you used in the stack.
> 
> C won't initialize variables for you as it would be a waste of time in
> the case you already initialize it with a non-NULL value.
> 
> Anyway as this is not PHP-related, I suggest this discussion to be
> continued outside of the PHP internals mailing list, if you have any
> question, I can probably give you some pointers to good documentation,
> just need to understand what you are trying to do.
> 
> 
> Best regards,
> Mark
>