metadata_exists()
Function: Determines if a meta field with the given key exists for the given object ID.
Source: wp-includes/meta.php:737
delete_{$meta_type}_meta
Action Hook: Fires immediately before deleting metadata of a specific type.
Source: wp-includes/meta.php:479
get_metadata_by_mid()
Function: Retrieves metadata by meta ID.
Source: wp-includes/meta.php:790
delete_postmeta
Action Hook: Fires immediately before deleting metadata for a post.
Source: wp-includes/meta.php:490
update_metadata_by_mid()
Function: Updates metadata by meta ID.
Source: wp-includes/meta.php:860
deleted_{$meta_type}_meta
Action Hook: Fires immediately after deleting metadata of a specific type.
Source: wp-includes/meta.php:528
delete_metadata_by_mid()
Function: Deletes metadata by meta ID.
Source: wp-includes/meta.php:982
deleted_postmeta
Action Hook: Fires immediately after deleting metadata for a post.
Source: wp-includes/meta.php:539
update_meta_cache()
Function: Updates the metadata cache for the specified objects.
Source: wp-includes/meta.php:1109
get_{$meta_type}_metadata
Filter Hook: Short-circuits the return value of a meta field.
Source: wp-includes/meta.php:635