Gets the file inode.
Path to the file.
Returns the inode number of the file, or FALSE in case of an error.
The results of this
function are cached. See clearstatcache() for
As of PHP 5.0.0 this function
can also be used with some URL wrappers. Refer to
Appendix O, List of Supported Protocols/Wrappers for a listing of which wrappers support
stat() family of functionality.