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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 |
---|---|
1138 | * - `update_comment_metadata_cache` |
1139 | * - `update_term_metadata_cache` |
1140 | * - `update_user_metadata_cache` |
1141 | * |
1142 | * @since 5.0.0 |
1143 | * |
1144 | * @param mixed $check Whether to allow updating the meta cache of the given type. |
1145 | * @param int[] $object_ids Array of object IDs to update the meta cache for. |
1146 | */ |
1147 | $check = apply_filters( "update_{$meta_type}_metadata_cache", null, $object_ids ); |
1148 | if ( null !== $check ) { |
1149 | return (bool) $check; |
1150 | } |
1151 |
|
1152 | $cache_key = $meta_type . '_meta'; |
1153 | $non_cached_ids = array(); |
1154 | $cache = array(); |
1155 | $cache_values = wp_cache_get_multiple( $object_ids, $cache_key ); |
1156 |
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