Attempts to rename oldname to newname.
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注: Prior to PHP 4.3.3, rename() could not rename files across partitions on *nix based systems.
注: As of PHP 5.0.0 rename() can also be used with some URL wrappers. Refer to 附錄 M for a listing of which wrappers support rename().
注: The wrapper used in oldname MUST match the wrapper used in newname.
注: Context support was added with PHP 5.0.0. For a description of contexts, refer to 參考 CLIII, Stream Functions.
See also copy(), unlink(), and move_uploaded_file().