Update the last_updated field for the current site.
get_object_subtype
Returns the object subtype for a given object ID of a specific 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
Registers a meta key.
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sanitize_meta
Sanitizes meta value.
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.
get_meta_sql
Given a meta query, generates SQL clauses to be appended to a main query.
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wp_metadata_lazyloader
Retrieves the queue for lazy-loading metadata.
update_meta_cache
Updates the metadata cache for the specified objects.
delete_metadata_by_mid
Deletes metadata by meta ID.