Docs: Correct and improve the documented types for various functions and hooks.

See #55646

Built from https://develop.svn.wordpress.org/trunk@53877


git-svn-id: http://core.svn.wordpress.org/trunk@53436 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/meta.php

@@ -1231,7 +1231,13 @@ function wp_metadata_lazyloader() {
  * @param string $primary_table     Primary database table name.
  * @param string $primary_id_column Primary ID column name.
  * @param object $context           Optional. The main query object
- * @return array Associative array of `JOIN` and `WHERE` SQL.
+ * @return string[]|false {
+ *     Array containing JOIN and WHERE SQL clauses to append to the main query,
+ *     or false if no table exists for the requested meta type.
+ *
+ *     @type string $join  SQL fragment to append to the main JOIN clause.
+ *     @type string $where SQL fragment to append to the main WHERE clause.
+ * }
  */
 function get_meta_sql( $meta_query, $type, $primary_table, $primary_id_column, $context = null ) {
 	$meta_query_obj = new WP_Meta_Query( $meta_query );