#37046 [Opn]: foreach breaks static scope
| From: | karoly at negyesi dot net | Date: | Wed, 12 Apr 2006 00:08:05 +0000 |
| Subject: | #37046 [Opn]: foreach breaks static scope | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-95644@lists.php.net to get a copy of this message | ||
ID: 37046
User updated by: karoly at negyesi dot net
Reported By: karoly at negyesi dot net
Status: Open
Bug Type: Scripting Engine problem
Operating System: Linux
PHP Version: 5.1.2
New Comment:
I thought best is if I provide one script...
<?php
function s($key) {
static $storage = array('a' => array('x', 'y'));
return $storage[$key];
}
function s1($key) {
static $storage = array('a' => array('x', 'y'));
return (array)$storage[$key];
}
function s2() {
static $storage = array('x', 'y');
return $storage;
}
function invoke($op, $st) {
foreach ($st('a') as $k => $function) {
echo "$op $k\n";
$function($op, $st);
}
}
function x($op, $st) {
if ($op == 'op1') invoke('op2', $st);
}
function y() {
}
invoke('op1', 's');
echo "\n";
invoke('op1', 's1');
echo "\n";
invoke('op1', 's2');
?>
You get
op1 0
op2 0
op2 1
op1 0
op2 0
op2 1
op1 1
op1 0
op2 0
op2 1
op1 1
if this is not a bug then why they differ?
Previous Comments:
------------------------------------------------------------------------
[2006-04-11 23:01:21] karoly at negyesi dot net
I think this is still a bug. See my first comment -- that differs very
slightly and yet it works.
------------------------------------------------------------------------
[2006-04-11 22:26:21] tony2001@php.net
You are using the same array in nested foreach() loops.
Apparently the array pointer is moved is the parent loop, which affect
the nested one.
No bug here.
------------------------------------------------------------------------
[2006-04-11 21:52:31] karoly at negyesi dot net
function storage() {
static $storage = array('x', 'y');
return $storage;
}
works as well.
------------------------------------------------------------------------
[2006-04-11 21:43:54] karoly at negyesi dot net
Description:
------------
foreach changes the array pointer of a static in another function.
Reproduce code:
---------------
<?php
function storage($key) {
// uncomment the following line to see the expected result
// return array('x', 'y');
static $storage = array('a' => array('x', 'y'));
return $storage[$key];
}
function invoke($op) {
foreach (storage('a') as $k => $function) {
echo "$op $k\n";
$function($op);
}
}
function x($op) {
if ($op == 'op1') invoke('op2');
}
function y() {
}
invoke('op1');
Expected result:
----------------
op1 0
op2 0
op2 1
op1 1
Actual result:
--------------
op1 0
op2 0
op2 1
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=37046&edit=1