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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 |
|---|---|
| 567 | 'widget_form_callback', |
| 568 | $instance, |
| 569 | $widget_object |
| 570 | ); |
| 571 | |
| 572 | if ( false !== $instance ) { |
| 573 | $return = $widget_object->form( $instance ); |
| 574 | |
| 575 | /** This filter is documented in wp-includes/class-wp-widget.php */ |
| 576 | do_action_ref_array( |
| 577 | 'in_widget_form', |
| 578 | array( &$widget_object, &$return, $instance ) |
| 579 | ); |
| 580 | } |
| 581 | |
| 582 | return ob_get_clean(); |
| 583 | } |
| 584 | |
| 585 | /** |