is_dir
Tells whether the filename is a directory
Syntax
is_dir ( string $filename ) : bool
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.
Return
Returns TRUE if the filename exists and is a directory, FALSE otherwise.
Examples
<?
var_dump(is_dir('file.txt'));
var_dump(is_dir('false_dir/abc'));
var_dump(is_dir('..')); //one directory up
?>
bool(false) bool(false) bool(true)