On Mon, Sep 17, 2012 at 8:57 PM, Camilo Sperberg <unreal4u@xxxxxxxxx> wrote:
>
> On 17 sep. 2012, at 10:55, Frank Arensmeier <farensmeier@xxxxxxxxx> wrote:
>
>> 17 sep 2012 kl. 10.50 skrev Camilo Sperberg:
>>
>>> Hello list, I have a little question with PHP's internal working. I've managed to reduce the test to the following lines:
>>>
>>> $globalVariable = 'i am a global variable';
>>> function testFunction() {
>>> global $globalVariable;
>>> unset($globalVariable);
>>> }
>>>
>>> testFunction();
>>>
>>> if(isset($globalVariable)) {
>>> var_dump('global variable IS set');
>>> } else {
>>> var_dump('global variable is NOT set');
>>> }
>>>
>>>
>>>
>>> When executing the above test, you will get printed that the global variable is set, despite unsetting it in the function. Is it really the intention to unset a global variable inside a function locally or have I just happen to found a little bug?
>>>
>>> unreal4u-MBP:~ unreal4u$ php --version
>>> PHP 5.3.13 with Suhosin-Patch (cli) (built: Jun 20 2012 17:05:20)
>>> Copyright (c) 1997-2012 The PHP Group
>>> Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies
>>> with Xdebug v2.3.0dev, Copyright (c) 2002-2012, by Derick Rethans
>>>
>>> If it is expected behavior, is there any documentation on why this is done this way?
>>>
>>> Greetings and thanks.
>>> --
>>> PHP General Mailing List (http://www.php.net/)
>>> To unsubscribe, visit: http://www.php.net/unsub.php
>>>
>> Sometimes, it helps reading the manual...
>>
>> http://lmgtfy.com/?q=php+unset+global
>>
>> "If a globalized variable is unset() inside of a function, only the local variable is destroyed. The variable in the calling environment will retain the same value as before unset() was called."
>> [...]
>> "To unset() a global variable inside of a function, then use the$GLOBALS array to do so:"
>>
>> Took about 1 minute to find out.
>>
>> /frank
>
> Doh! Only thing I can say is that I tried searching but without any relevant terms… Thanks and also thanks to Simon!
>
> Greetings.
Just a general note, the PHP manual is pretty good.
- Matijn
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
