From: dennis at inmarket dot lviv dot ua
Operating system: Win
PHP version: 5.0.2
PHP Bug Type: *General Issues
Bug description: Foreach same array with a reference ($x=>&$y) bug
Description:
------------
If you foreach an array with a reference (foreach $a as $x=>&$y),
modifying $y, and then without it (foreach $a as $x=>$y), on the second
time it will return incorrect results.
The sample code has two functions - each iterates over array with a
reference to value and modifies it and then they foreach that array -
first function without a reference, and the second - with a reference. The
first function fails to iterate to the end of array. However, the print_r
shows the array is ok.
Reproduce code:
---------------
function test1() {
$a = array('key1'=>'value1', 'key2'=>'value2', 'key3'=>'value3');
foreach($a as $k=>&$v) {
$v .= '0';
}
print_r($a);
foreach($a as $k=>$v) {
echo $k .'=' . $v . "\r\n";
}
}
function test2() {
$a = array('key1'=>'value1', 'key2'=>'value2', 'key3'=>'value3');
foreach($a as $k=>&$v) {
$v .= '0';
}
print_r($a);
foreach($a as $k=>&$v) {
echo $k .'=' . $v . "\r\n";
}
}
test1();
test2();
Expected result:
----------------
Array
(
[key1] => value10
[key2] => value20
[key3] => value30
)
key1=value10
key2=value20 <- all values properly changed
key3=value30
Array
(
[key1] => value10
[key2] => value20
[key3] => value30
)
key1=value10
key2=value20 <- all values properly changed
key3=value30
Actual result:
--------------
Array
(
[key1] => value10
[key2] => value20
[key3] => value30
)
key1=value10
key2=value20
key3=value20 <- SHOULD BE '30'
Array
(
[key1] => value10
[key2] => value20
[key3] => value30
)
key1=value10
key2=value20
key3=value30
--
Edit bug report at http://bugs.php.net/?id=31118&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=31118&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=31118&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=31118&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=31118&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=31118&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=31118&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=31118&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=31118&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=31118&r=support
Expected behavior: http://bugs.php.net/fix.php?id=31118&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=31118&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=31118&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=31118&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=31118&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=31118&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=31118&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=31118&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=31118&r=float
MySQL Configuration Error: http://bugs.php.net/fix.php?id=31118&r=mysqlcfg
