mkdir ( string $pathname [, int $mode = 0777 [, bool $recursive = FALSE [, resource $context ]]] ) : bool
The directory path.
The mode is 0777 by default, which means the widest possible access. For more information on modes, read the details on the chmod() page.
Note: mode is ignored on Windows.
Note: You probably want to specify the mode as an octal number, which means it should have a leading zero. The mode is also modified by the current umask, which you can change using umask().
Allows the creation of nested directories specified in the pathname.
Note: Context support was added with PHP 5.0.0. For a description of contexts, refer to Streams.
Returns TRUE on success or FALSE on failure.