$settings Widget settings. * @param array $allowed Allowed settings for shortcode. * * @return string Shortcode attributes string. */ public static function get_attributes_string( $settings, $allowed = [] ) { $settings_string = ''; $allowed = array_flip( $allowed ); foreach ( $settings as $key => $value ) { if ( ! empty( $allowed ) && ! isset( $allowed[ $key ] ) ) { continue; } $key = esc_attr( $key ); if ( is_array( $value ) ) { $value = implode( ', ', $value ); } $value = esc_attr( $value ); $settings_string .= " {$key}=\"{$value}\""; } return $settings_string; } }