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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 |
|---|---|
| 287 | $r = array_merge($defaults, $r); |
| 288 | |
| 289 | $output = ''; |
| 290 | $current_page = 0; |
| 291 | |
| 292 | // sanitize, mostly to keep spaces out |
| 293 | $r['exclude'] = preg_replace('[^0-9,]', '', $r['exclude']); |
| 294 | |
| 295 | // Allow plugins to filter an array of excluded pages |
| 296 | $r['exclude'] = implode(',', apply_filters('wp_list_pages_excludes', explode(',', $r['exclude']))); |
| 297 | |
| 298 | // Query pages. |
| 299 | $pages = get_pages($r); |
| 300 | |
| 301 | if ( !empty($pages) ) { |
| 302 | if ( $r['title_li'] ) |
| 303 | $output .= '<li class="pagenav">' . $r['title_li'] . '<ul>'; |
| 304 | |
| 305 | global $wp_query; |