WP_Widget::form()
Method: Outputs the settings update form.
Source: wp-includes/class-wp-widget.php:143
widget_form_callback
Filter Hook: Filters the widget instance’s settings before displaying the control form.
Source: wp-includes/class-wp-widget.php:530
WP_Widget::__construct()
Method: PHP5 constructor.
Source: wp-includes/class-wp-widget.php:163
in_widget_form
Action Hook: Fires at the end of the widget control form.
Source: wp-includes/class-wp-widget.php:553