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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 |
|---|---|
| 1239 | * @since 1.5.1 |
| 1240 | * @since 4.4.0 `$pages` added as arguments. |
| 1241 | * |
| 1242 | * @see wp_list_pages() |
| 1243 | * |
| 1244 | * @param string $output HTML output of the pages list. |
| 1245 | * @param array $r An array of page-listing arguments. |
| 1246 | * @param array $pages List of WP_Post objects returned by `get_pages()` |
| 1247 | */ |
| 1248 | $html = apply_filters( 'wp_list_pages', $output, $r, $pages ); |
| 1249 | |
| 1250 | if ( $r['echo'] ) { |
| 1251 | echo $html; |
| 1252 | } else { |
| 1253 | return $html; |
| 1254 | } |
| 1255 | } |
| 1256 | |
| 1257 | /** |