   #PHP Manual Filesystem functions glob is_executable

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                                    is_dir

   (PHP 3, PHP 4 )
   is_dir -- Tells whether the filename is a directory

Description

   bool is_dir ( string filename)

   Returns TRUE if the filename exists and is a directory. If filename is
   a relative filename, it will be checked relative to the current
   working directory.

     Note: The results of this function are cached. See clearstatcache()
     for more details.

     Tip: As of PHP 5.0.0 this function can also be used with some url
     wrappers. Refer to Appendix I for a listing of which wrappers
     support stat() family of functionality.

   See also chdir(), dir, opendir(), is_file() and is_link().
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