#46458 [Opn->Bgs]: Tricky, undocumented trait of global keyword
| From: | vrana@php.net | Date: | Tue, 04 Nov 2008 16:32:26 +0000 |
| Subject: | #46458 [Opn->Bgs]: Tricky, undocumented trait of global keyword | ||
| References: | 1 | Groups: | php.doc.bugs |
| Request: | Send a blank email to doc-bugs+get-1314@lists.php.net to get a copy of this message | ||
ID: 46458
Updated by: vrana@php.net
Reported By: gmtfn at yahoo dot com
-Status: Open
+Status: Bogus
Bug Type: Documentation problem
Operating System: Linux
PHP Version: Irrelevant
New Comment:
Variables in PHP aren't declared so storing a value to a variable
creates it.
Previous Comments:
------------------------------------------------------------------------
[2008-11-01 19:24:34] gmtfn at yahoo dot com
Description:
------------
Qualifying a variable with the keyword global has a tricky but
undocumented effect -- it doesn't merely allow code in a function to
access global variable, but it actually creates global variables. This
should be clearly described in the manual.
Reproduce code:
---------------
function main() {
global $num;
$num = 10;
test();
}
function test()
{
$number = $GLOBALS['num'];
echo "num = $number";
}
Expected result:
----------------
num =
because $num isn't declared outside all functions
Actual result:
--------------
num = 10
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=46458&edit=1