File Content: indexable-category-permalink-watcher.php <?php namespace Yoast\WP\SEO\Integrations\Watchers; use WPSEO_Utils; use Yoast\WP\SEO\Config\Indexing_Reasons; /** * Watches the stripcategorybase key in wpseo_titles, in order to clear the permalink of the category indexables. */ class Indexable_Category_Permalink_Watcher extends Indexable_Permalink_Watcher { /** * Initializes the integration. * * This is the place to register hooks and filters. * * @return void */ public function register_hooks() { \add_action( 'update_option_wpseo_titles', [ $this, 'check_option' ], 10, 2 ); } /** * Checks if the stripcategorybase key in wpseo_titles has a change in value, and if so, * clears the permalink for category indexables. * * @param array $old_value The old value of the wpseo_titles option. * @param array $new_value The new value of the wpseo_titles option. * * @return void */ public function check_option( $old_value, $new_value ) { // If this is the first time saving the option, in which case its value would be false. if ( $old_value === false ) { $old_value = []; } // If either value is not an array, return. if ( ! \is_array( $old_value ) || ! \is_array( $new_value ) ) { return; } // If both values aren't set, they haven't changed. if ( ! isset( $old_value['stripcategorybase'] ) && ! isset( $new_value['stripcategorybase'] ) ) { return; } // If a new value has been set for 'stripcategorybase', clear the category permalinks. if ( $old_value['stripcategorybase'] !== $new_value['stripcategorybase'] ) { $this->indexable_helper->reset_permalink_indexables( 'term', 'category', Indexing_Reasons::REASON_CATEGORY_BASE_PREFIX ); // Clear the rewrites, so the new permalink structure is used. WPSEO_Utils::clear_rewrites(); } } } Submit