is_dir

(PHP 4, PHP 5, PHP 7)

Tells whether the filename is a directory

bool is_dir ( string $filename )

Tells whether the given filename is a directory.

Parameters:

filename

Path to the file. If filename is a relative filename, it will be checked relative to the current working directory. If filename 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.

Returns:

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

Exception:

Upon failure, an E_WARNING is emitted.

Notes:

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

Examples:

is_dir() 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)