getSubdir(); if ( $this->filesystem->is_dir( $subdir ) && $this->filesystem->is_writable( $subdir ) ) { return true; } return $this->filesystem->mkdir( $subdir, 0755 & ~ umask() ); } /** * This declaration throws a "Strict standards" warning in PHP 5.6. * @todo: Remove the comment when we drop support for PHP 5.6. */ //abstract public static function getSubdir(); }