Req->Bug #40334 [Opn->Csd]: natsort() does not work for some numbers

Edit report at https://bugs.php.net/bug.php?id=40334&edit=1 ID: 40334 Updated by: cmb@php.net Reported by: den4b at mail dot ru Summary: natsort() does not work for some numbers -Status: Open +Status: Closed -Type: Feature/Change Request +Type: Bug -Package: Feature/Change Request +Package: *General Issues Operating System: Windows XP SP2 PHP Version: 5.2.0 -Assigned To: +Assigned To: cmb Block user comment: N Private report: N New Comment: This issue has been already resolved as of PHP 5.2.10, see <https://3v4l.org/QocSD>. Previous Comments: ------------------------------------------------------------------------ [2007-06-25 11:36:31] den4b at mail dot ru Author meant that the leading zeros are not ignored ONLY for fractional parts. For example: 1.001 < 1.002 < 1.010 < 1.02 < 1.1 < 1.3 But in any other cases, leading zeros are ignored. For example: pic2 pic02 pic02a pic3 pic100 pic100a pic120 pic121 pic02000 x2-y7 x2-y08 x8-y8 ------------------------------------------------------------------------ [2007-06-25 10:27:15] dennis at d23 dot nl The text clearly states: "Leading zeros are not ignored, which tends to give more reasonable results on decimal fractions" Strangely the example at http://sourcefrog.net/projects/natsort/example-out.txt does not comply with the above statement. Actual results comply with the statement, so not a bug it seems, more a feature request. I can see the use for a toggle to ignore leading zeroes. ------------------------------------------------------------------------ [2007-02-05 20:44:32] den4b at mail dot ru LOL, you are simply amazing, you know that?!! That's exactly where I pointed you to! And now look at their example: http://sourcefrog.net/projects/natsort/example-out.txt Especially note these fragments: --------------- pic100 pic100a pic120 pic121 pic02000 --------------- x2-g8 x2-y7 x2-y08 x8-y8 --------------- Do "pic02000" and "x2-y08" come first because of the zero?! Is there anybody else (professional enough) to address this issue, or will I have to argue with you for the rest of the year? ;-) Some of the implementations listed on that site contain ERRORS! And I'm afraid PHP has adopted the wrong implementation. ------------------------------------------------------------------------ [2007-02-05 20:25:53] tony2001@php.net Start with this link http://sourcefrog.net/projects/natsort/ if you don't understand what "natural sort order" means. ------------------------------------------------------------------------ [2007-02-05 20:18:44] den4b at mail dot ru OMFG man.. can't you see it?!! Natural order sort algorithm meant to treat NUMBERS as NUMERIC values, thus comparing them NUMERICALLY, NOT AS CHARACTERS (like you are saying). 02 = 2 1 = 1 Does 2 comes before 1 ?!! It gets even better... 02000 = 2000 Does 2000 comes before 1 ?!! I think left alignment misleads you, so I've added an extra space in front of 1. What will you say this time? Reproduce code: --------------------- $a = array('a 02', 'a 1', 'a 02000', 'a 03'); natsort($a); print_r($a); Result (incorrect) --------------------- Array ( [0] => a 02 [2] => a 02000 [3] => a 03 [1] => a 1 ) Expected result: --------------------- Array ( [1] => a 1 [0] => a 02 [3] => a 03 [2] => a 02000 ) ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=40334 -- Edit this bug report at https://bugs.php.net/bug.php?id=40334&edit=1