Re: [PHP] Expected behaviour or bug?
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.
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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
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Re: [PHP] Expected behaviour or bug?
On 17/09/2012, at 8:50 PM, Camilo Sperberg unrea...@gmail.com wrote:
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.
That's expected, as per http://nz.php.net/unset:
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.
---
Simon Welsh
Admin of http://simon.geek.nz/
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Re: [PHP] Expected behaviour or bug?
On 17 sep. 2012, at 10:55, Frank Arensmeier farensme...@gmail.com 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.
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PHP General Mailing List (http://www.php.net/)
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Re: [PHP] Expected behaviour or bug?
On Mon, Sep 17, 2012 at 8:57 PM, Camilo Sperberg unrea...@gmail.com wrote:
On 17 sep. 2012, at 10:55, Frank Arensmeier farensme...@gmail.com 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
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