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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 |
|---|---|
| 47 | /** |
| 48 | * Filters the widget title. |
| 49 | * |
| 50 | * @since 2.6.0 |
| 51 | * |
| 52 | * @param string $title The widget title. Default 'Pages'. |
| 53 | * @param array $instance Array of settings for the current widget. |
| 54 | * @param mixed $id_base The widget ID. |
| 55 | */ |
| 56 | $title = apply_filters( 'widget_title', $title, $instance, $this->id_base ); |
| 57 | |
| 58 | $sortby = empty( $instance['sortby'] ) ? 'menu_order' : $instance['sortby']; |
| 59 | $exclude = empty( $instance['exclude'] ) ? '' : $instance['exclude']; |
| 60 | |
| 61 | if ( 'menu_order' === $sortby ) { |
| 62 | $sortby = 'menu_order, post_title'; |
| 63 | } |
| 64 | |
| 65 | $output = wp_list_pages( |