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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 |
|---|---|
| 515 | else |
| 516 | $depth = -1; // Flat. |
| 517 | |
| 518 | $output .= walk_category_tree( $categories, $depth, $r ); |
| 519 | } |
| 520 | |
| 521 | if ( $title_li && 'list' == $style ) |
| 522 | $output .= '</ul></li>'; |
| 523 | |
| 524 | $output = apply_filters( 'wp_list_categories', $output, $args ); |
| 525 | |
| 526 | if ( $echo ) |
| 527 | echo $output; |
| 528 | else |
| 529 | return $output; |
| 530 | } |
| 531 | |
| 532 | /** |
| 533 | * Display tag cloud. |