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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 |
|---|---|
| 1098 | $exclude_array = ( $r['exclude'] ) ? explode( ',', $r['exclude'] ) : array(); |
| 1099 | |
| 1100 | /** |
| 1101 | * Filter the array of pages to exclude from the pages list. |
| 1102 | * |
| 1103 | * @since 2.1.0 |
| 1104 | * |
| 1105 | * @param array $exclude_array An array of page IDs to exclude. |
| 1106 | */ |
| 1107 | $r['exclude'] = implode( ',', apply_filters( 'wp_list_pages_excludes', $exclude_array ) ); |
| 1108 | |
| 1109 | // Query pages. |
| 1110 | $r['hierarchical'] = 0; |
| 1111 | $pages = get_pages( $r ); |
| 1112 | |
| 1113 | if ( ! empty( $pages ) ) { |
| 1114 | if ( $r['title_li'] ) { |
| 1115 | $output .= '<li class="pagenav">' . $r['title_li'] . '<ul>'; |
| 1116 | } |