Bug #53553 [Fbk->Opn]: Same value items reverted in asort() and arsort()

Edit report at http://bugs.php.net/bug.php?id=53553&edit=1 ID: 53553 User updated by: clau dot cristea at gmail dot com Reported by: clau dot cristea at gmail dot com Summary: Same value items reverted in asort() and arsort() -Status: Feedback +Status: Open Type: Bug Package: Arrays related Operating System: Debian PHP Version: 5.3.4 Block user comment: N Private report: N New Comment: > Where is it stated in the docs the sort is stable? Don't know... Where is stated that is not? Previous Comments: ------------------------------------------------------------------------ [2010-12-16 11:52:27] cataphract@php.net Where is it stated in the docs the sort is stable? ------------------------------------------------------------------------ [2010-12-16 11:10:39] clau dot cristea at gmail dot com Description: ------------ After sorting an associative array with asort() or arsort() items having same value are reverted. Those sorting must preserve order on same value case. --- From manual page: http://www.php.net/function.arsort --- Test script: --------------- <?php $a = array('first' => 2, 'second' => 2); $b = $a; // Save original. print "Original:\n"; print_r($a); asort($a); print "\n\nasort():\n"; print_r($a); arsort($b); print "\n\narsort():\n"; print_r($b); print "\n"; ?> Expected result: ---------------- I'm expecting that asort() and arsort() to preserve the order of items having the same value. Actual result: -------------- See below asort(); and arsort(); that keys were reverted. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=53553&edit=1