php man page for is_dir

IS_DIR(3)								 1								 IS_DIR(3)

is_dir - Tells whether the filename is a directory

SYNOPSIS
       bool is_dir (string  $filename)

DESCRIPTION
	Tells whether the given filename is a directory.

PARAMETERS
	      o $filename
		-  Path  to the file. If $filename is a relative filename, it will be checked relative to the current working directory. If $file-
		name is a symbolic or hard link then the link will be resolved and checked. If you have enabled safe mode, or open_basedir further
		restrictions may apply.

RETURN VALUES
	Returns TRUE if the filename exists and is a directory, FALSE otherwise.

EXAMPLES
       Example #1

	      is_dir(3) example

	      <?php
	      var_dump(is_dir('a_file.txt'));
	      var_dump(is_dir('bogus_dir/abc'));

	      var_dump(is_dir('..')); //one dir up
	      ?>

	      The above example will output:

	      bool(false)
	      bool(false)
	      bool(true)

ERRORS
/EXCEPTIONS
	Upon failure, an E_WARNING is emitted.

NOTES
       Note

	      The results of this function are cached. See clearstatcache(3) for more details.

       Tip

	      As  of  PHP  5.0.0,  this function can also be used with some URL wrappers. Refer to "Supported Protocols and Wrappers" to determine
	      which wrappers support stat(3) family of functionality.

SEE ALSO
       chdir(3), dir(3), opendir(3), is_file(3), is_link(3).

PHP Documentation Group 														 IS_DIR(3)