Bug #63714 [Nab]: incorrect global statement
Edit report at https://bugs.php.net/bug.php?id=63714&edit=1
ID: 63714
Updated by: laruence@php.net
Reported by: axdr at bk dot ru
Summary: incorrect global statement
Status: Not a bug
Type: Bug
Package: Scripting Engine problem
Operating System: Windows
PHP Version: 5.4.9
Block user comment: N
Private report: N
New Comment:
also see:
<?php
function func() {
global $a, $b;
$a = 'aaa';
$b = &$a;
$b = 'bbb';
}
func();
var_dump($a);
output:
bbb
Previous Comments:
------------------------------------------------------------------------
[2012-12-07 02:52:22] laruence@php.net
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to
report
a bug at http://bugs.php.net/how-to-report.php
global $a;
make a local variable 'a' reference to $GLOBALS['a'];
also thinking of:
$b = &$a; // b reference to a
$b = &$c; // change reference to c
then:
global $a, $b; //b reference to $GLOBALS['b']
$a = 'aaa';
$b = &$a; //b now reference to local $a with GLOBALS['b'] unchanged
------------------------------------------------------------------------
[2012-12-07 02:44:58] axdr at bk dot ru
'global'-declaration kills referencies
function func() {
global $a, $b;
$a = 'aaa';
$b = &$a;
echo "$a, $b", '<br>';
global $a, $b;
echo "$a, $b";
}
func();
output:
aaa, aaa
aaa,
------------------------------------------------------------------------
[2012-12-07 02:37:38] axdr at bk dot ru
Description:
------------
'global'-declaration inside a function dosn't affect referencies.
Test script:
---------------
function func() {
global $a, $b;
$a = 'aaa';
$b = &$a;
$GLOBALS['c'] = &$a;
}
func();
echo "$a, $b, $c";
Expected result:
----------------
aaa, aaa, aaa
Actual result:
--------------
aaa, , aaa
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=63714&edit=1
Thread (8 messages)