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add_{$meta_type}_metadata ›

apply_filters( "add_{$meta_type}_metadata", null, $object_id, $meta_key, $meta_value, $unique )
Parameters: (5)
  • (null|bool) $check Whether to allow adding metadata for the given type.
    Required: Yes
  • (int) $object_id Object ID.
    Required: Yes
  • (string) $meta_key Meta key.
    Required: Yes
  • (mixed) $meta_value Meta value. Must be serializable if non-scalar.
    Required: Yes
  • (bool) $unique Whether the specified meta key should be unique for the object. Optional. Default false.
    Required: Yes
Defined at:

Filters whether to add metadata of a specific type.

The dynamic portion of the hook, $meta_type, refers to the meta object type (comment, post, term, or user). Returning a non-null value will effectively short-circuit the function.


$check = apply_filters( "add_{$meta_type}_metadata", null, $object_id, $meta_key, $meta_value, $unique );