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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.
This hook occurs 3 times in this file.
| Line | Code |
|---|---|
| 4166 | $last_changed = microtime(); |
| 4167 | wp_cache_set( 'last_changed', $last_changed, 'posts' ); |
| 4168 | } |
| 4169 | |
| 4170 | $cache_key = "get_pages:$key:$last_changed"; |
| 4171 | if ( $cache = wp_cache_get( $cache_key, 'posts' ) ) { |
| 4172 | // Convert to WP_Post instances |
| 4173 | $pages = array_map( 'get_post', $cache ); |
| 4174 | /** This filter is documented in wp-includes/post.php */ |
| 4175 | $pages = apply_filters( 'get_pages', $pages, $r ); |
| 4176 | return $pages; |
| 4177 | } |
| 4178 | |
| 4179 | if ( !is_array($cache) ) |
| 4180 | $cache = array(); |
| 4181 | |
| 4182 | $inclusions = ''; |
| 4183 | if ( ! empty( $include ) ) { |
| 4184 | $child_of = 0; //ignore child_of, parent, exclude, meta_key, and meta_value params if using include |
| Line | Code |
| 4297 | $query .= " ORDER BY " . $sort_column . " " . $sort_order ; |
| 4298 | |
| 4299 | if ( !empty($number) ) |
| 4300 | $query .= ' LIMIT ' . $offset . ',' . $number; |
| 4301 | |
| 4302 | $pages = $wpdb->get_results($query); |
| 4303 | |
| 4304 | if ( empty($pages) ) { |
| 4305 | /** This filter is documented in wp-includes/post.php */ |
| 4306 | $pages = apply_filters( 'get_pages', array(), $r ); |
| 4307 | return $pages; |
| 4308 | } |
| 4309 | |
| 4310 | // Sanitize before caching so it'll only get done once |
| 4311 | $num_pages = count($pages); |
| 4312 | for ($i = 0; $i < $num_pages; $i++) { |
| 4313 | $pages[$i] = sanitize_post($pages[$i], 'raw'); |
| 4314 | } |
| 4315 | |
| Line | Code |
| 4347 | |
| 4348 | /** |
| 4349 | * Filter the retrieved list of pages. |
| 4350 | * |
| 4351 | * @since 2.1.0 |
| 4352 | * |
| 4353 | * @param array $pages List of pages to retrieve. |
| 4354 | * @param array $r Array of get_pages() arguments. |
| 4355 | */ |
| 4356 | $pages = apply_filters( 'get_pages', $pages, $r ); |
| 4357 | |
| 4358 | return $pages; |
| 4359 | } |
| 4360 | |
| 4361 | // |
| 4362 | // Attachment functions |
| 4363 | // |
| 4364 | |
| 4365 | /** |