Returns the object subtype for a given object ID of a specific type.
get_object_subtype_{$object_type}
Filters the object subtype identifier for a non standard object type.
_wp_register_meta_args_whitelist
Filters out `register_meta()` args based on a whitelist.
get_registered_metadata
Retrieves registered metadata for a specified object.
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get_registered_meta_keys
Retrieves a list of registered meta keys for an object type.
unregister_meta_key
Unregisters a meta key from the list of registered keys.
registered_meta_key_exists
Checks if a meta key is registered.
register_meta_args
Filters the registration arguments when registering meta.
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register_meta
Registers a meta key.
sanitize_{$object_type}_meta_{$meta_key}
Filters the sanitization of a specific meta key of a specific meta type.
sanitize_meta
Sanitizes meta value.
sanitize_{$object_type}_meta_{$meta_key}_for_{$object_subtype}
Filters the sanitization of a specific meta key of a specific meta type and subtype.
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is_protected_meta
Filters whether a meta key is considered protected.
is_protected_meta
Determines whether a meta key is considered protected.
_get_meta_table
Retrieves the name of the metadata table for the specified object type.
