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Changes between Version 2 and Version 3 of Ticket #57375, comment 2

v2	v3
18	18	`rename()`, on the other hand, simply updates the ''metadata''. This makes `rename()` significantly more performant. It is purpose-built for moving files and directories.
19	19
	20	Upon failure, falling back to `copy_dir()` is the appropriate behaviour.
	21
20	22	== PHP's `rename()` under the hood
21	23	As mentioned above, `rename()` updates the ''metadata''. However, when PHP's `rename( $from, $to )` is called with `$from` and `$to` on different drives, it uses a recursive copy. For anyone who has ever dragged and dropped a file/directory from one drive to another, you'll likely have noticed that this makes a copy on the second drive. This isn't a negative, but just a bit of extra information on how `rename()` handles this scenario for those interested.