# is_dir

(PHP 4, PHP 5, PHP 7)

is_dir — Tells whether the filename is a directory

### Description

is_dir ( string `$filename` ) : bool

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 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() 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() 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() family of functionality.

### See Also

- chdir() - Change directory
- dir() - Return an instance of the Directory class
- opendir() - Open directory handle
- is_file() - Tells whether the filename is a regular file
- is_link() - Tells whether the filename is a symbolic link