Edit report at https://bugs.php.net/bug.php?id=63833&edit=1
ID: 63833 User updated by: francois dot dambrine at isen-lille dot fr Reported by: francois dot dambrine at isen-lille dot fr -Summary: udiff doesn't compare properly inside arrays +Summary: diff doesn't compare properly inside arrays Status: Not a bug Type: Bug Package: Arrays related Operating System: Windows PHP Version: 5.5.0alpha2 Block user comment: N Private report: N New Comment: problem in the title Previous Comments: ------------------------------------------------------------------------ [2012-12-22 13:30:18] francois dot dambrine at isen-lille dot fr I know it is multidimensional array. My problem is that if I want to compute the difference between those thwo multidimentional arrays. For now I can use array_udiff to get only the subarray with "lable"=>"Label1X" and Label2X, I have to use array_udiff even if when I test $A[0] == $B[0] I get true. So I was wondering if it was a bug or just a lack of precision in the documentation. If it is a documentation problem, I can go to edit.php.net ------------------------------------------------------------------------ [2012-12-22 13:01:54] ras...@php.net The documentation clearly states, "This function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using array_diff($array1[0], $array2[0]);." Your example is using 2-dimensional arrays. ------------------------------------------------------------------------ [2012-12-22 12:38:38] francois dot dambrine at isen-lille dot fr Description: ------------ This bug was introduced to me by a stackoverflow post http://stackoverflow.com/questions/13815287/union-two-associative-array- php/13815578#13815578 I tested the behaviour with php 5.5 Alpha 2 and the "bug" is still there. As of the documentation, it is said that array_diff uses an "internal function" to compare two elements. As equality is the only thing that matters for array_diff I thought this internal function was something that "==" behind. But even if two arrays are equal (same members) array_diff does not take it in account. I mark it as a bug but it can only be a documentation problem. Test script: --------------- <?php $A = Array( array( 'lable' =>"label0", 'id_poste'=>1, 'id_part'=>11 ), array( 'lable' =>"label1", 'id_poste'=>2, 'id_part'=>12 ), array( 'lable' =>"label2", 'id_poste'=>3, 'id_part'=>13 ), array( 'lable' =>"label3", 'id_poste'=>4, 'id_part'=>14 ) ); $B = Array( array( 'lable' =>"label0", 'id_poste'=>1, 'id_part'=>11 ), array( 'lable' =>"label1_X", 'id_poste'=>2, 'id_part'=>12 ), array( 'lable' =>"label2", 'id_poste'=>3, 'id_part'=>13 ), array( 'lable' =>"label3_X", 'id_poste'=>4, 'id_part'=>14 ) ); var_dump(array_diff_assoc($B,$A)); Expected result: ---------------- Array(2){ [0]=>array(3){ ["lable"] =>"label1_X", ["id_poste"]=>2, ["id_part"]=>12 }, [1]=>array(3){ ["lable"] =>"label3_X", ["id_poste"]=>4, ["id_part"]=>14 } } Actual result: -------------- array(0){ } ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=63833&edit=1
