#8353 [Opn->Fbk]: foreach modify array pointer
| From: | iliaa@php.net | Date: | Mon, 25 Nov 2002 05:10:41 +0000 |
| Subject: | #8353 [Opn->Fbk]: foreach modify array pointer | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-25755@lists.php.net to get a copy of this message | ||
ID: 8353
Updated by: iliaa@php.net
Reported By: lunepi@comlink.org
-Status: Open
+Status: Feedback
Bug Type: Arrays related
PHP Version: 4.3.0-dev
New Comment:
IMO this is not a bug. Foreach works virtually like while + each
combination, with a few exceptions such as not requiring a reset()
prior to execution since it does not care about the current position in
the array.
As far as current(), next() and simular are concerned,
while (each($arr)); == foreach ($arr as $v);, once the loops are
complete current() will return FALSE. This IMO is a consistent
behaviour and is definately not a bug. I believe this is merely a
documentation issue.
Previous Comments:
------------------------------------------------------------------------
[2002-11-21 15:21:34] philip@php.net
foreach essentially REMOVES the array pointer alltogether on the
original array.
$arr = array('a','b'); foreach ($arr as $v); var_dump( current($arr)
);
$arr = array('a','b'); foreach ($arr as $v); reset($arr); var_dump(
current($arr) );
Results:
bool(false)
string(1) "a"
Using key() instead of current() results in NULL instead of false.
Where did the pointer go?
Conclusion:
Either foreach() has a feature that removes the array pointer from the
original array or it's a bug. If it's seen as a feature please explain
why so it can be documented.
------------------------------------------------------------------------
[2001-03-09 21:32:57] sniper@php.net
no feedback.
------------------------------------------------------------------------
[2001-01-05 22:52:10] sniper@php.net
I get 121 for both cases. Please try the latest snapshot from
http://snaps.php.net/
--Jani
------------------------------------------------------------------------
[2000-12-21 09:44:03] lunepi@comlink.org
try 1.:
$var[] = "1";
$var[] = "2";
foreach($var as $test)
{
echo $test;
}
reset($var);
echo current($var);
output -> 12
then try:
$var[] = "1";
$var[] = "2";
//reset($var);
foreach($var as $test)
{
echo $test;
current($var);
}
echo current($var);
output -> 121
this should be the output of the first script too?
Greetings lunepi
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=8353&edit=1