#21444 [Opn->Bgs]: Asort output not fully sorted in mixed type array with BOOLEANs

ID: 21444 Updated by: andrey@php.net Reported By: xxx1844@thihigh.com -Status: Open +Status: Bogus Bug Type: Arrays related Operating System: Windows XP Pro Build 2600 PHP Version: 4.3.0 New Comment: IMO this is not PHP problem but the way the compares are done. You have to master the type juggling to see that the result is correct. I have reduced your testcase to this : <?php $arr1 = array("a","b","c","d","4",5,4,"true","TRUE",true); sort($arr1); var_dump($arr1); ?> The output is : array(10) { [0]=> bool(true) [1]=> int(4) [2]=> string(1) "4" [3]=> string(4) "TRUE" [4]=> string(1) "a" [5]=> string(1) "b" [6]=> string(1) "c" [7]=> string(1) "d" [8]=> string(4) "true" [9]=> int(5) } It may look strange - why (int)5 is after all the strings. This is because "4" is lower than (int) 5, "4" is before "true" and "true" is before 5. The first 2 are obvious, the third one is not. But it is ok. It's better not to mix types in the array. If 5 is changed to "5" then "5" goes right after "4". Bogusifying Previous Comments: ------------------------------------------------------------------------ [2003-01-05 16:44:32] xxx1844@thihigh.com Last addition: I meant sort() where I used asort(), but the result is the same.... ------------------------------------------------------------------------ [2003-01-05 16:32:32] xxx1844@thihigh.com Well, it appears to be only related to the BOOLEAN array item. Removing that from the original array leaves a perfectly sorted array as far as I can see now. ------------------------------------------------------------------------ [2003-01-05 16:26:51] xxx1844@thihigh.com I use PHP4.0.3 on Apache 1.3.27, both standard binaries as supplied on the download site. Freshly installed yesterday. No modifications. I used the php.ini-recommended file as php.ini Installed exactly as prescribed in install.txt, only instead of c:/php I use d:/program files/php and changed the ini accordingly. Adapted the apache conf file as described. I used below script in an attempt to judge workload forced on the php server as well as asort() speed. Output is a bit large to add here, but can be requested via my email. In short, the array IS sorted, but in all identical "subrows" every now and then one or two array items are 1's (I assume the equivalent of TRUE. Rerunning the script results in the SAME faults. Sorting within the script twice or more does not change the faulty array. Tried with single-type arrays, that doesn't seem to produce the same errors, but this was not thoroughly tested. I am sorry, but I haven't figured out a way to get a backtrace yet, I am relatively new to this PHP stuff. For your convenience, you can run the script from my server by opening http://eniac.xs4all.nl/tut8.php and see my PHP server details on http://eniac.xs4all.nl/x345info.php (I noticed this script still 'sees' remainders of previous 1.3.24 apache as well as the correct 1.3.27 installs, allthough the .24 has been removed... More info ? Contact me at my email. Thanks! <?php $arr1 = array("a","b","c","d","4",5,4,"true","TRUE",true); /* concatenate to itself 10 times to get a real LONG array (5120 elements) */ for ($p = 1; $p < 10; $p++) { $arr1 = array_merge ($arr1,$arr1); } asort($arr1); foreach ($arr1 as $val) { print $val." ";} ?> ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=21444&edit=1