#33854 [Opn->Bgs]: array_diff depending on element sequence

ID: 33854 Updated by: iliaa@php.net Reported By: bob dot siefkes at packardbell dot com -Status: Open +Status: Bogus Bug Type: Arrays related Operating System: XP SP2 PHP Version: 5.0.4 New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php if you want keys & position to be considered use the array_diff_assoc() function. Previous Comments: ------------------------------------------------------------------------ [2005-07-25 21:26:16] bob dot siefkes at packardbell dot com I did confuse the two result blocks... Expected result: <--> Actual result: ------------------------------------------------------------------------ [2005-07-25 21:23:22] bob dot siefkes at packardbell dot com Description: ------------ Behavor of array_diff is dependent on the sequence of the elements in the array. See $array2 where I changed the sequence of "a"=>"c" with "a"=>"d" and it results in different output. Be noted that the key of both elements is the same, still I would not expect array_diff to take this into account. Bob Reproduce code: --------------- // source 1 $array1 = array("a" => "c", "b" => "b" ); $array2 = array("a" => "c", "a" => "d" ); $result = array_diff($array1, $array2); // source 2 $array1 = array("a" => "c", "b" => "b" ); $array2 = array("a" => "d", "a" => "c" ); $result = array_diff($array1, $array2); Expected result: ---------------- // result1: Array ( [a] => c [b] => b ) // result2 Array ( [b] => b ) Actual result: -------------- // for both I would expect Array ( [b] => b ) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=33854&edit=1