Create a directory within the wordpress uploads folder

When we developing a plugin or theme, it can be useful to be able to programmatically create a directory within the wordpress uploads folder.

Simply paste this code snippet on your functions.php file (or plugin file if you’re creating a plugin)

function my_upload_dir() {

$upload = wp_upload_dir();
$upload_dir = $upload['basedir'];
$upload_dir = $upload_dir . '/mypluginfiles';
if (! is_dir($upload_dir)) {
mkdir( $upload_dir, 0700 );
}
}

register_activation_hook( __FILE__, 'my_upload_dir' );