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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 |
|---|---|
| 463 | * Filter the widget instance's settings before displaying the control form. |
| 464 | * |
| 465 | * Returning false effectively short-circuits display of the control form. |
| 466 | * |
| 467 | * @since 2.8.0 |
| 468 | * |
| 469 | * @param array $instance The current widget instance's settings. |
| 470 | * @param WP_Widget $this The current widget instance. |
| 471 | */ |
| 472 | $instance = apply_filters( 'widget_form_callback', $instance, $this ); |
| 473 | |
| 474 | $return = null; |
| 475 | if ( false !== $instance ) { |
| 476 | $return = $this->form($instance); |
| 477 | |
| 478 | /** |
| 479 | * Fires at the end of the widget control form. |
| 480 | * |
| 481 | * Use this hook to add extra fields to the widget form. The hook |