add_{$meta_type}_meta
Action Hook: Fires immediately before meta of a specific type is added.
Source: wp-includes/meta.php:96
add_{$meta_type}_metadata
Filter Hook: Filters whether to add metadata of a specific type.
Source: wp-includes/meta.php:72
Action Hook: Fires immediately before meta of a specific type is added.
Source: wp-includes/meta.php:96
Filter Hook: Filters whether to add metadata of a specific type.
Source: wp-includes/meta.php:72