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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 |
|---|---|
| 23 | extract( $args ); |
| 24 | |
| 25 | $title = apply_filters('widget_title', empty( $instance['title'] ) ? __( 'Pages' ) : $instance['title']); |
| 26 | $sortby = empty( $instance['sortby'] ) ? 'menu_order' : $instance['sortby']; |
| 27 | $exclude = empty( $instance['exclude'] ) ? '' : $instance['exclude']; |
| 28 | |
| 29 | if ( $sortby == 'menu_order' ) |
| 30 | $sortby = 'menu_order, post_title'; |
| 31 | |
| 32 | $out = wp_list_pages( apply_filters('widget_pages_args', array('title_li' => '', 'echo' => 0, 'sort_column' => $sortby, 'exclude' => $exclude) ) ); |
| 33 | |
| 34 | if ( !empty( $out ) ) { |
| 35 | echo $before_widget; |
| 36 | if ( $title) |
| 37 | echo $before_title . $title . $after_title; |
| 38 | ?> |
| 39 | <ul> |
| 40 | <?php echo $out; ?> |
| 41 | </ul> |