unregister_meta_key()
Function: Unregisters a meta key from the list of registered keys.
Source: wp-includes/meta.php:1150
Function: Unregisters a meta key from the list of registered keys.
Source: wp-includes/meta.php:1150
Function: Retrieves a list of registered meta keys for an object type.
Source: wp-includes/meta.php:1198
Function: Sanitize meta value.
Source: wp-includes/meta.php:958
Function: Checks if a meta key is registered.
Source: wp-includes/meta.php:1133