#19259 [Opn->Fbk]: usort() leaves array unsorted

From: Date: Fri, 06 Sep 2002 10:25:00 +0000
Subject: #19259 [Opn->Fbk]: usort() leaves array unsorted
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-18566@lists.php.net to get a copy of this message 
 ID:               19259
 Updated by:       sniper@php.net
 Reported By:      bug020905@stormkeepers.com
-Status:           Open
+Status:           Feedback
 Bug Type:         Arrays related
 Operating System: OSF1 V4.0 1229
 PHP Version:      4.2.2
 New Comment:

Please try using this CVS snapshot:

  http://snaps.php.net/php4-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php4-win32-latest.zip


Previous Comments:
------------------------------------------------------------------------

[2002-09-05 18:44:59] bug020905@stormkeepers.com

usort() does not seem to be actually sorting the
array.  The user-defined sort function is being
called, but no matter what the function does, the
array remains in its original order.

The "Example 1" cut-and-pasted from the usort()
function documentation page:

   function cmp ($a, $b) {
       if ($a == $b) return 0;
       return ($a > $b) ? -1 : 1;
   }

   $a = array (3, 2, 5, 6, 1);

   usort ($a, "cmp");

   while (list ($key, $value) = each ($a)) {
       echo "$key: $value\n";
   }

Produces the following output:
   0: 3
   1: 2
   2: 5
   3: 6
   4: 1

(Should have returned the values in descending
order, as on the usort() documentation page.)

The other examples do not work on this platform,
either; they always leave the array unmodified.

Configuration line reported by phpinfo():
'./configure' '--with-apache=../apache_1.3.26' '--with-gd=/
usr/local' '--with-png-dir=/usr/local' '--with-jpeg-dir=/
usr/local' '--with-zlib-dir=/usr/local' '--with-xml' '--
with-dom=/usr/local' '--with-dom-xslt=/usr/local' '--with-
dom-exslt=/usr/local' '--with-mysql' '--with-mm' '--enable-
discard-path' '--prefix=/usr/local/apache-1.3.26' '--
enable-memory-limit=yes' '--enable-debug=no' '--enable-
safe-mode'


------------------------------------------------------------------------


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