Edit report at https://bugs.php.net/bug.php?id=55731&edit=1
ID: 55731
Comment by: hytest at gmail dot com
Reported by:421034509 at qq dot com
Summary:__get after __unset
Status: Bogus
Type: Bug
Package:Unknown/Other Function
Operating System: windows xp
PHP Version:5.3.8
Block user comment: N
Private report: N
New Comment:
If we add following code:
echo $example->p3;
It still just call __get once. Why it doesn't call it twice?
( one for "p3" and one for "\0example\0p3" ? )
In another word: what's the different between a property not defined and a
unset
private property?
Previous Comments:
[2011-09-21 09:02:15] 421034509 at qq dot com
Thank you very much!You are so kind and patient!
I see your blog!
It's great!
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[2011-09-21 08:07:48] larue...@php.net
kind of right, you can refer to zend_std_read_property(in
Zend/zend_object_handlers.c) for more details.
and btw, you seems to be a chinese(using qq email), so if you are interesting
of
php internal, plz look at laruence.com, I will write these down in chinese in
couple of days
[2011-09-21 07:42:19] 421034509 at qq dot com
p1:
You mean __unset() made the p1 out of $example->properties?
When get_property_info successed,
zend vm return a property info with name "\0Example\0p1"
but it can't find p1 in $example->properties ?
So zend vm try to fetch "\0Example\0p1" and set a getter_guard for
"\0Example\0p1" and call getter again.
p2:
When get_property_info successed,
zend vm return a property info with name "\0Example\0p2"
and p2 can be found in $example->properties.
So zend vm wont try to fetch "\0Example\0p1" but successed and return p2?
[2011-09-21 03:32:28] larue...@php.net
p2 is a litte different, see blow:
1. you call $example->p2
2. zend vm call read_propery , in which internal will check property_info and
socpe, since this
is called out from example->ce, so get_property_info will deny and return NULL,
then zend vm
assume you are try to access a public "p2"()
3. so zend vm set a getter_guard for "p2" and call getter try to find "p2"
(output
"call_get()!")
4. in your custom getter, you fetch $example->p2
5. zend vm call read_property, the first begining is similar to the situation
when you trying to fetch p1, but, zend vm
find p2 in $example->properties(this it the key difference), then suceed and
return.
[2011-09-21 00:48:39] 421034509 at qq dot com
Thanks for your explain,but there is something I still can't understand.
In 2:what's the "called out from $Example->ce" mean?
(Sorry!My English is poor and I have studied PHP a short time)
Do you mean I call $example->p1 out of the class?
If so,I call $example->p2 out of the class too.
Then,in my custom getter, I attempt fetch $this->p2.
in this case, it attempt to access p2 in example class scope ,
why dosn't it call getter again?
Can you explain why $example->p2 call getter only once for me like before?
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