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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 445 | * Filter the widget instance's settings before displaying the control form. |
| 446 | * |
| 447 | * Returning false effectively short-circuits display of the control form. |
| 448 | * |
| 449 | * @since 2.8.0 |
| 450 | * |
| 451 | * @param array $instance The current widget instance's settings. |
| 452 | * @param WP_Widget $this The current widget instance. |
| 453 | */ |
| 454 | $instance = apply_filters( 'widget_form_callback', $instance, $this ); |
| 455 | |
| 456 | $return = null; |
| 457 | if ( false !== $instance ) { |
| 458 | $return = $this->form($instance); |
| 459 | |
| 460 | /** |
| 461 | * Fires at the end of the widget control form. |
| 462 | * |
| 463 | * Use this hook to add extra fields to the widget form. The hook |