Hidden Input

Field Render

Display a hidden input allowing you to pass custom data to the current form. The field wrapper won’t be displayed.

Field Settings

Field Value

Value can then be retrieved using the common get_field() function. Usage example:

$hidden = get_field('hidden');

// my_value

Custom Value

It is possible to change the field value using the acf/prepare_field hook. Note that the value will saved like any other custom meta. Usage example:

/*
 * ACF Prepare Field
 * https://www.advancedcustomfields.com/resources/acf-prepare_field/
 */
add_filter('acf/prepare_field/name=hidden', 'my_acf_hidden');
function my_acf_hidden($field){
    
    $field['default_value'] = 'my_value';
    
    // Or:
    $field['value'] = 'my_value';
    
    return $field;
    
}

To prevent the value from being saved as a custom meta, you can use the acf/update_value hook and return null. Usage example:

/*
 * ACF Update Value
 * https://www.advancedcustomfields.com/resources/acf-update_value/
 */
add_filter('acf/update_value/name=hidden', 'my_acf_hidden_update', 10, 3);
function my_acf_hidden_update($value, $post_id, $field){
    
    return null;
    
}