Hook called before text widget save

Question

I want to know which hook/action is called just before the Text Widget content and title is stored in the database. I googled alot but could not able to get the hook name.

What I want is whenever a text widget save button is trigger (in admin panel) I want to apply my custom content customize function and the return the updated content so that WP can saves it.

Please Note: My question is not a duplicate of this question, because it deals with filter and I'm looking for hook or action. It can be a one solution but is not a good solution in my case, because it'll a time consuming.
For example: I have 10 active text widget in my sidebar and for every page hit on each widget render widget_text will be called. So I'm looking for a better solution.

Any help would be greatly appreciated.
Thanks.

Answer 1

Not sure what you're after here, another options maybe possible, but there's e.g. this hook:

/**
 * Filters a widget's settings before saving.
 *
 * Returning false will effectively short-circuit the widget's ability
 * to update settings.
 *
 * @since 2.8.0
 *
 * @param array     $instance     The current widget instance's settings.
 * @param array     $new_instance Array of new widget settings.
 * @param array     $old_instance Array of old widget settings.
 * @param WP_Widget $this         The current widget instance.
 */
 $instance = apply_filters( 
    'widget_update_callback', 
    $instance, 
    $new_instance, 
    $old_instance, 
    $this 
);

Here's an example how we can target Text widgets and modify the text input field, when they are updated:

add_filter( 'widget_update_callback', function( $instance, $new, $old, $obj )
{
    if( 'text' === $obj->id_base && ! empty( $instance['text'] ) )
    {
        // Warning this overrides the widget instance text input:
        // $instance['text'] = 'override text';
    }

    return $instance;
}, 10, 4 );