Bug #12936: array_multisort and passing by reference
| From: | kat at audiogalaxy dot com | Date: | Fri, 24 Aug 2001 02:17:34 +0000 |
| Subject: | Bug #12936: array_multisort and passing by reference | ||
| Groups: | php.dev | ||
| Request: | Send a blank email to php-dev+get-64210@lists.php.net to get a copy of this message | ||
From: kat@audiogalaxy.com
Operating system: linux
PHP version: 4.0.4
PHP Bug Type: Arrays related
Bug description: array_multisort and passing by reference
When called inside a function array_multisort changes the global variables
instead of the local copy the function should be working with.
<?php
$sortKeys = array(3, 2, 4, 1, 5);
$a = array(111 => '111', 222 => '222', 333 => '333', 444
=> '444',
555 => '555');
echo "initial arrays:<br>";
echo "sortKeys: "; var_dump($sortKeys); echo "<br>";
echo "a: "; var_dump($a); echo "<br>";
echo "<br>";
msortWithRef($sortKeys, $a);
echo "after msortWithRef:<br>";
echo "sortKeys: "; var_dump($sortKeys); echo "<br>";
echo "a: "; var_dump($a); echo "<br>";
echo "<br>";
msortWithoutRef($sortKeys, $a);
echo "after msortWithoutRef:<br>";
echo "sortKeys: "; var_dump($sortKeys); echo "<br>";
echo "a: "; var_dump($a); echo "<br>";
function msortWithoutRef($array1, $array2)
{
array_multisort($array1, $array2);
}
function msortWithRef($array1, $array2)
{
array_multisort(&$array1, &$array2);
}
?>
output:
initial arrays:
sortKeys: array(5) { [0]=> int(3) [1]=> int(2) [2]=> int(4) [3]=> int(1)
[4]=> int(5) }
a: array(5) { [111]=> string(3) "111" [222]=> string(3) "222" [333]=>
string(3) "333" [444]=> string(3) "444" [555]=> string(3) "555"
}
after msortWithRef:
sortKeys: array(5) { [0]=> int(3) [1]=> int(2) [2]=> int(4) [3]=> int(1)
[4]=> int(5) }
a: array(5) { [111]=> string(3) "111" [222]=> string(3) "222" [333]=>
string(3) "333" [444]=> string(3) "444" [555]=> string(3) "555"
}
after msortWithoutRef:
sortKeys: array(5) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4)
[4]=> int(5) }
a: array(5) { [0]=> string(3) "444" [1]=> string(3) "222" [2]=>
string(3)
"111" [3]=> string(3) "333" [4]=> string(3) "555" }
--
Edit bug report at: http://bugs.php.net/?id=12936&edit=1