sanitize_{$object_type}_meta_{$meta_key}
Filter Hook: Filters the sanitization of a specific meta key of a specific meta type.
Source: wp-includes/meta.php:1348
register_meta()
Function: Registers a meta key.
Source: wp-includes/meta.php:1399
register_meta_args
Filter Hook: Filters the registration arguments when registering meta.
Source: wp-includes/meta.php:1447
registered_meta_key_exists()
Function: Checks if a meta key is registered.
Source: wp-includes/meta.php:1590
unregister_meta_key()
Function: Unregisters a meta key from the list of registered keys.
Source: wp-includes/meta.php:1608
get_registered_meta_keys()
Function: Retrieves a list of registered metadata args for an object type, keyed by their meta keys.
Source: wp-includes/meta.php:1657
get_registered_metadata()
Function: Retrieves registered metadata for a specified object.
Source: wp-includes/meta.php:1683
delete_{$meta_type}_metadata
Filter Hook: Short-circuits deleting metadata of a specific type.
Source: wp-includes/meta.php:428
delete_{$meta_type}_meta
Action Hook: Fires immediately before deleting metadata of a specific type.
Source: wp-includes/meta.php:479
delete_postmeta
Action Hook: Fires immediately before deleting metadata for a post.
Source: wp-includes/meta.php:490