Bug #80155 [Com]: basename("/tmp","tmp") fails

Edit report at https://bugs.php.net/bug.php?id=80155&edit=1 ID: 80155 Comment by: divinity76 at gmail dot com Reported by: divinity76 at gmail dot com Summary: basename("/tmp","tmp") fails Status: Not a bug Type: Bug Package: *Directory/Filesystem functions Operating System: both Windows and Linux PHP Version: 7.4.10 Block user comment: N Private report: N New Comment: it seems the GNU basename documentation (at https://www.gnu.org/software/coreutils/manual/html_node/basename-invocation.html#basename-invocation ) doesn't say anything about what happens when the suffix matches the whole name, much like the PHP documentation Previous Comments: ------------------------------------------------------------------------ [2020-09-27 14:29:54] divinity76 at gmail dot com @ sjon@php.net nowhere in the documentation do i see anything like "if the suffix is the whole name, it will not be cut off", perhaps it is a documentation issue then? wonder what the GNU basename documentation says about it, I'll take a look at that ------------------------------------------------------------------------ [2020-09-27 12:44:10] sjon@php.net . ------------------------------------------------------------------------ [2020-09-27 12:43:35] sjon@php.net 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 while unexpected - this behavior matches what GNU's basename returns, see: $ basename /tmp mp t $ basename /tmp tmp tmp I assume this is because once the entire pathname is removed, it would no longer be a suffix ------------------------------------------------------------------------ [2020-09-27 11:43:38] divinity76 at gmail dot com Description: ------------ running basename("/tmp","tmp") fails to remove the "tmp" suffix from the end of the name. tested on PHP 8.0.0 beta3 running on Linux, and PHP 7.3.7 running on Windows 10. Test script: --------------- <?php var_dump(basename("/tmp","mp")); var_dump(basename("/tmp","tmp")); Expected result: ---------------- string(1) "t" string(0) "" Actual result: -------------- string(1) "t" string(3) "tmp" ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80155&edit=1