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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 |
|---|---|
| 284 | |
| 285 | if ( ! empty($pages) ) { |
| 286 | $output = "<select name='$name' id='$name'>\n"; |
| 287 | if ( $show_option_none ) |
| 288 | $output .= "\t<option value=''>$show_option_none</option>\n"; |
| 289 | $output .= walk_page_dropdown_tree($pages, $depth, $r); |
| 290 | $output .= "</select>\n"; |
| 291 | } |
| 292 | |
| 293 | $output = apply_filters('wp_dropdown_pages', $output); |
| 294 | |
| 295 | if ( $echo ) |
| 296 | echo $output; |
| 297 | |
| 298 | return $output; |
| 299 | } |
| 300 | |
| 301 | function wp_list_pages($args = '') { |
| 302 | $defaults = array( |