Bug #54530 [Opn->Bgs]: strnatcasecmp treats alphanumeric values before symbols

Edit report at http://bugs.php.net/bug.php?id=54530&edit=1 ID: 54530 Updated by: aharvey@php.net Reported by: chatfielddaniel at googlemail dot com Summary: strnatcasecmp treats alphanumeric values before symbols -Status: Open +Status: Bogus Type: Bug -Package: Unknown/Other Function +Package: Strings related Operating System: Windows 7 PHP Version: Irrelevant Block user comment: N Private report: N New Comment: Just like all of the other comparison functions, strnatcmp() and strnatcasecmp() eventually fall back to a straight byte value by byte value comparison if the "natural" alphanumeric sorting logic isn't triggered. Since the underscore character has a higher character code than any number or uppercase letter (and case-insensitive comparisons are done on uppercased strings), it's always "after" letters and numbers. This behaviour isn't going to change. Previous Comments: ------------------------------------------------------------------------ [2011-04-14 12:59:37] chatfielddaniel at googlemail dot com Description: ------------ --- From manual page: http://www.php.net/function.strnatcasecmp --- The strnatcasecmp is set that '_' is after letters and numbers which is illogical and should be changed. Test script: --------------- echo strnatcasecmp('1','2');//-1 echo strnatcasecmp('_','2');//1 (incorrect) echo strnatcasecmp('_','a');//1 (incorrect) echo strnatcasecmp('a','b');//-1 echo strnatcasecmp(2,'a');//-1 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=54530&edit=1