WP_Widget::widget()
Method: Echoes the widget content.
Source: wp-includes/class-wp-widget.php:113
widget_update_callback
Filter Hook: Filters a widget’s settings before saving.
Source: wp-includes/class-wp-widget.php:476
WP_Widget::update()
Method: Updates a particular instance of a widget.
Source: wp-includes/class-wp-widget.php:131
WP_Widget::form_callback()
Method: Generates the widget control form (Do NOT override).
Source: wp-includes/class-wp-widget.php:503