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# is_dir

(PHP 3 <= 3.0.18, PHP 4 >= 4.0.0)

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.

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

This function will not work on remote files; the file to be examined must be accessible via the server's filesystem.

See also is_file() and is_link().

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