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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 |
|---|---|
| 742 | |
| 743 | $output = ''; |
| 744 | $current_page = 0; |
| 745 | |
| 746 | // sanitize, mostly to keep spaces out |
| 747 | $r['exclude'] = preg_replace('/[^0-9,]/', '', $r['exclude']); |
| 748 | |
| 749 | // Allow plugins to filter an array of excluded pages (but don't put a nullstring into the array) |
| 750 | $exclude_array = ( $r['exclude'] ) ? explode(',', $r['exclude']) : array(); |
| 751 | $r['exclude'] = implode( ',', apply_filters('wp_list_pages_excludes', $exclude_array) ); |
| 752 | |
| 753 | // Query pages. |
| 754 | $r['hierarchical'] = 0; |
| 755 | $pages = get_pages($r); |
| 756 | |
| 757 | if ( !empty($pages) ) { |
| 758 | if ( $r['title_li'] ) |
| 759 | $output .= '<li class="pagenav">' . $r['title_li'] . '<ul>'; |
| 760 | |