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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 |
|---|---|
| 249 | else |
| 250 | $depth = -1; // Flat. |
| 251 | |
| 252 | $output .= walk_category_tree($categories, $depth, $r); |
| 253 | } |
| 254 | |
| 255 | if ( $title_li && 'list' == $style ) |
| 256 | $output .= '</ul></li>'; |
| 257 | |
| 258 | echo apply_filters('wp_list_categories', $output); |
| 259 | } |
| 260 | |
| 261 | // |
| 262 | // Helper functions |
| 263 | // |
| 264 | |
| 265 | function walk_category_tree() { |
| 266 | $walker = new Walker_Category; |
| 267 | $args = func_get_args(); |