flush_rules example

function flush_rewrite_rules( $hard = true ) {
    global $wp_rewrite;

    if ( is_callable( array( $wp_rewrite, 'flush_rules' ) ) ) {
        $wp_rewrite->flush_rules( $hard );
    }
}

/** * Adds an endpoint, like /trackback/. * * Adding an endpoint creates extra rewrite rules for each of the matching * places specified by the provided bitmask. For example: * * add_rewrite_endpoint( 'json', EP_PERMALINK | EP_PAGES ); * * will add a new rewrite rule ending with "json(/(.*))?/?$" for every permastruct * that describes a permalink (post) or page. This is rewritten to "json=$match" * where $match is the part of the URL matched by the endpoint regex (e.g. "foo" in * "[permalink]/json/foo/"). * * A new query var with the same name as the endpoint will also be created. * * When specifying $places ensure that you are using the EP_* constants (or a * combination of them using the bitwise OR operator) as their values are not * guaranteed to remain static (especially `EP_ALL`). * * Be sure to flush the rewrite rules - see flush_rewrite_rules() - when your plugin gets * activated and deactivated. * * @since 2.1.0 * @since 4.3.0 Added support for skipping query var registration by passing `false` to `$query_var`. * * @global WP_Rewrite $wp_rewrite WordPress rewrite component. * * @param string $name Name of the endpoint. * @param int $places Endpoint mask describing the places the endpoint should be added. * Accepts a mask of: * - `EP_ALL` * - `EP_NONE` * - `EP_ALL_ARCHIVES` * - `EP_ATTACHMENT` * - `EP_AUTHORS` * - `EP_CATEGORIES` * - `EP_COMMENTS` * - `EP_DATE` * - `EP_DAY` * - `EP_MONTH` * - `EP_PAGES` * - `EP_PERMALINK` * - `EP_ROOT` * - `EP_SEARCH` * - `EP_TAGS` * - `EP_YEAR` * @param string|bool $query_var Name of the corresponding query variable. Pass `false` to skip registering a query_var * for this endpoint. Defaults to the value of `$name`. */

        if ( ! is_multisite() ) {
            update_user_meta( $user_id, 'show_welcome_panel', 1 );
        } elseif ( ! is_super_admin( $user_id ) && ! metadata_exists( 'user', $user_id, 'show_welcome_panel' ) ) {
            update_user_meta( $user_id, 'show_welcome_panel', 2 );
        }

        if ( is_multisite() ) {
            // Flush rules to pick up the new page.             $wp_rewrite->init();
            $wp_rewrite->flush_rules();

            $user = new WP_User( $user_id );
            $wpdb->update( $wpdb->options, array( 'option_value' => $user->user_email ), array( 'option_name' => 'admin_email' ) );

            // Remove all perms except for the login user.             $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->usermeta WHERE user_id != %d AND meta_key = %s", $user_id, $table_prefix . 'user_level' ) );
            $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->usermeta WHERE user_id != %d AND meta_key = %s", $user_id, $table_prefix . 'capabilities' ) );

            /* * Delete any caps that snuck into the previously active blog. (Hardcoded to blog 1 for now.) * TODO: Get previous_blog_id. */