From: bugs dot php dot net at chsc dot dk
Operating system: Linux
PHP version: 4.3.7
PHP Bug Type: Arrays related
Bug description: usort() does not trigger an error when callback does not exist
Description:
------------
When the second argument to usort() is not a valid callback, no error is
triggered, and the return value is true.
This makes debugging tricky.
When invoked with an invalid callback, usort() for some reason rearranges
the values in the array anyway.
Reproduce code:
---------------
<?php
error_reporting(E_ALL);
$array = array(1, 7, 3, 2);
var_dump(usort($array, 'not a function name'));
var_dump($array);
var_dump(usort($array, 9999));
var_dump($array);
var_dump(usort($array, array('foo', 'bar')));
var_dump($array);
?>
Expected result:
----------------
The output should be three error messages, three times "bool(false)" and
three times the original array.
Actual result:
--------------
bool(true)
array(4) {
[0]=>
int(2)
[1]=>
int(3)
[2]=>
int(7)
[3]=>
int(1)
}
bool(true)
array(4) {
[0]=>
int(1)
[1]=>
int(7)
[2]=>
int(3)
[3]=>
int(2)
}
bool(true)
array(4) {
[0]=>
int(2)
[1]=>
int(3)
[2]=>
int(7)
[3]=>
int(1)
}
--
Edit bug report at http://bugs.php.net/?id=29049&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=29049&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=29049&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=29049&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=29049&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=29049&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=29049&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=29049&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=29049&r=support
Expected behavior: http://bugs.php.net/fix.php?id=29049&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=29049&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=29049&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=29049&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=29049&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=29049&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=29049&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=29049&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=29049&r=float
