var q renameafileinwindowscmdPHP rename Manual. From the Changelog notes Warnings may be generated if the destination filesystem doesnt permit chown or chmod system calls to be made on files for example, if the destination filesystem is a FAT filesystem. More explicitly, rename may still return bool true, despite the warnings that result from the underlying calls to chown or chmod. This behavior can be misleading absent a deeper understanding of the underlying mechanics. To rename across filesystems, PHP fakes it by calling copy, unlink, chown, and chmod not necessarily in that order. See PHP bug 5. 06. On UNIX like operating systems, filesystems may be mounted with an explicit uid andor gid for example, with mount options uidsomeuser,gidsomegroup. Attempting to call rename with such a destination filesystem will cause an Operation not permitted warning, even though the file is indeed renamed and rename returns bool true. This is not a bug. Either handle the warning as is appropriate to your use case, or call copy and then unlink, which will avoid the doomed calls to chown and chmod, thereby eliminating the warning. Renaming Multiple Files At Once Windows. Sips from the Can Blog Archive Slumming with the Windows Command Intepreter on at 1203 am. Are you pulling your hair out over how to batch rename or delete hundreds or thousands of files Chances are, someone else is already bald and figured it out. We show. REN. Rename a file or files. REN drivepathSourceMask TargetMask. RENAME is a synonym for REN. You cannot specify a different drive or path for TargetMask use.