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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 |
|---|---|
| 272 | 'child_of' => 0, 'exclude' => '', 'title_li' => __('Pages'), 'echo' => 1, 'authors' => ''); |
| 273 | $r = array_merge($defaults, $r); |
| 274 | |
| 275 | $output = ''; |
| 276 | |
| 277 | // sanitize, mostly to keep spaces out |
| 278 | $r['exclude'] = preg_replace('[^0-9,]', '', $r['exclude']); |
| 279 | |
| 280 | // Allow plugins to filter an array of excluded pages |
| 281 | $r['exclude'] = implode(',', apply_filters('wp_list_pages_excludes', explode(',', $r['exclude']))); |
| 282 | |
| 283 | // Query pages. |
| 284 | $pages = get_pages($r); |
| 285 | |
| 286 | if ( !empty($pages) ) { |
| 287 | if ( $r['title_li'] ) |
| 288 | $output .= '<li class="pagenav">' . $r['title_li'] . '<ul>'; |
| 289 | |
| 290 | global $wp_query; |