#24118 [Asn->Bgs]: Error while using foreach
| From: | zeev@php.net | Date: | Wed, 11 Jun 2003 07:59:27 +0000 |
| Subject: | #24118 [Asn->Bgs]: Error while using foreach | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-41665@lists.php.net to get a copy of this message | ||
ID: 24118
Updated by: zeev@php.net
Reported By: young at sl dot com dot ua
-Status: Assigned
+Status: Bogus
Bug Type: Scripting Engine problem
Operating System: FreeBSD 4.7, Linux
PHP Version: 4.3.2, 4.3.3-dev, 5.0.0-dev
Assigned To: zeev
New Comment:
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
Taking the reproducible example:
<?php
$arr = array(1, 2, 3, 4, 5);
$sizeOf = sizeof($arr);
for ($i = 0; $i < $sizeOf; $i++) {
$row =& $arr[$i];
$row = $row * $row;
}
foreach ($arr as $row) {
echo $row."<br>";
}
?>
You shouldn't be using the reference variable that you used previously
in the foreach loop, since every iteration will assign the value to
both $row, and any other references it's attached to, in this case,
$arr[4]. This is why you get the last iterated value ($arr[3]) in
$arr[4], when you get to it.
Previous Comments:
------------------------------------------------------------------------
[2003-06-10 18:15:29] elmicha@php.net
Yes; more evidence:
<?php
$arr = array(1, 2, 3, 4, 5);
$sizeOf = sizeof($arr);
for ($i = 0; $i < $sizeOf; $i++) {
$row = &$arr[$i];
}
foreach ($arr as $row) {
echo $row."<br>";
}
?>
Output: 1<br>2<br>3<br>4<br>4<br>
<?php
$arr = array(1, 2, 3, 4, 5);
$sizeOf = sizeof($arr);
for ($i = 0; $i < $sizeOf; $i++) {
$row = &$arr[$i];
}
foreach ($arr as $x) {
echo $x."<br>";
}
?>
Output: 1<br>2<br>3<br>4<br>5<br>
------------------------------------------------------------------------
[2003-06-10 17:56:08] sniper@php.net
Zeev, here is first one I verified with both 4.3.3-dev and 5.0.0-dev.
Have fun fixing this one. :)
------------------------------------------------------------------------
[2003-06-10 17:32:00] young at sl dot com dot ua
Sample code to make this bug:
<?php
$arr = array(1, 2, 3, 4, 5);
$sizeOf = sizeof($arr);
for ($i = 0; $i < $sizeOf; $i++) {
$row =& $arr[$i];
$row = $row * $row;
}
foreach ($arr as $row) {
echo $row."<br>";
}
?>
Return
1
4
9
16
16
------------------------------------------------------------------------
[2003-06-10 17:24:46] elmicha@php.net
Not enough information was provided for us to be able
to handle this bug. Please re-read the instructions at
http://bugs.php.net/how-to-report.php
If you can provide more information, feel free to add it
to this bug and change the status back to "Open".
Thank you for your interest in PHP.
------------------------------------------------------------------------
[2003-06-10 17:20:10] young at sl dot com dot ua
Source code N1:
-----
foreach ($sqldata as $row) {
$item = $row;
print_r($item);
}
-----
Result 1:
Array
(
[DURATION] => 7
)
Array
(
[DURATION] => 230
)
Array
(
[DURATION] => 230
)
-----
Source code 2:
-----
foreach ($sqldata as $item) {
print_r($item);
}
-----
Result 2:
-----
Array
(
[DURATION] => 7
)
Array
(
[DURATION] => 230
)
Array
(
[DURATION] => 50
)
------
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=24118&edit=1