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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 |
---|---|
500 | * Filter the widget instance's settings before displaying the control form. |
501 | * |
502 | * Returning false effectively short-circuits display of the control form. |
503 | * |
504 | * @since 2.8.0 |
505 | * |
506 | * @param array $instance The current widget instance's settings. |
507 | * @param WP_Widget $this The current widget instance. |
508 | */ |
509 | $instance = apply_filters( 'widget_form_callback', $instance, $this ); |
510 |
|
511 | $return = null; |
512 | if ( false !== $instance ) { |
513 | $return = $this->form($instance); |
514 |
|
515 | /** |
516 | * Fires at the end of the widget control form. |
517 | * |
518 | * Use this hook to add extra fields to the widget form. The hook |