(PHP 4, PHP 5)
rename — Renames a file or directory
$oldname
   , string $newname
   [, resource $context
  ] )
   Attempts to rename oldname to
   newname, moving it between directories if necessary.
   If newname exists, it will be overwritten.
  
oldname
Note:
The old name. The wrapper used in
oldnamemust match the wrapper used innewname.
newnameThe new name.
contextNote: Context support was added with PHP 5.0.0. For a description of contexts, refer to Streams.
   Returns TRUE on success or FALSE on failure.
  
| Version | Description | 
|---|---|
| 5.3.1 | rename() can now rename files across drives in Windows. | 
| 5.0.0 | rename() can now also be used with some URL wrappers. Refer to Supported Protocols and Wrappers for a listing of which wrappers support rename(). | 
| 4.3.3 | rename() may now be able to rename files across partitions on *nix based systems, provided the appropriate permissions are held. Warnings may be generated if the destination filesystem doesn't permit chown() or chmod() system calls to be made on files — for example, if the destination filesystem is a FAT filesystem. | 
Example #1 Example with rename()
<?php
rename("/tmp/tmp_file.txt", "/home/user/login/docs/my_file.txt");
?>