Settings page "switch" field - hopefully quick question

Hi Kevin,

Thank you for reaching out.

You can hook a function to the action rwmb_{$meta_box_id}_after_save_post with the latest meta box register on the settings page. After saving the value of this meta box, the custom function will be fired.

Get more details in the documentation
https://docs.metabox.io/actions/#rwmb_after_save_post
https://docs.metabox.io/extensions/mb-settings-page/#getting-field-value

Hi,

Here is an example:

1. The code which I use to create a settings page and a meta box with a switch field

add_filter( 'mb_settings_pages', 'custom_settings_page' );

function custom_settings_page( $settings_pages ) {
    $settings_pages[] = [
        'menu_title'  => __( 'Options', 'project-name' ),
        'option_name' => 'my_options',
        'id'        => 'my_options',
        'position'    => 25,
        'columns'     => 1,
        'icon_url'    => 'dashicons-admin-generic',
    ];

    return $settings_pages;
}

add_filter( 'rwmb_meta_boxes', 'custom_sitewide_fields_group' );

function custom_sitewide_fields_group( $meta_boxes ) {
    $prefix = '';

    $meta_boxes[] = [
        'title'          => __( 'My Meta Box', 'project-name' ),
        'id'             => 'my-meta-box',
        'settings_pages' => 'my_options',
        'fields'         => [
            [
                'id'        => 'enable_slider',
                'name'      => 'Enable Slider?',
                'type'      => 'switch',
                'style'     => 'rounded',
                'on_label'  => 'Yes',
                'off_label' => 'No',
            ],
        ],
    ];
    return $meta_boxes;
}

See more on docs https://docs.metabox.io/extensions/mb-settings-page/
https://docs.metabox.io/fields/switch/

2. The code which I use to create a custom function and hook to the action rwmb_{$meta_box_id}_after_save_post, the function will be fired after you click Save Settings on the settings page.

add_action( 'rwmb_my-meta-box_after_save_post', function() {
    $enable_slider = rwmb_meta( 'enable_slider', ['object_type' => 'setting'], 'my_options' );
        
    if( $enable_slider ) {
        // function goes here
        echo "Enabled";
    } else {
        // function goes here
        echo "Disabled";
    }
} );

Hope that makes sense.