Short-circuits adding metadata of a specific type.
Description
The dynamic portion of the hook name, $meta_type, refers to the meta object type (post, comment, term, user, or any other type with an associated meta table).Returning a non-null value will effectively short-circuit the function. Possible hook names include: <ul> <li>add_post_metadata</li> <li>add_comment_metadata</li> <li>add_term_metadata</li> <li>add_user_metadata</li> </ul>
Parameters
$checknull|bool
Whether to allow adding metadata for the given type.
$object_idint
ID of the object metadata is for.
$meta_keystring
Metadata key.
$meta_valuemixed
Metadata value. Must be serializable if non-scalar.
$uniquebool
Whether the specified meta key should be unique for the object.
80* @param null|bool$check Whether to allow adding metadata for the given type.81* @param int$object_idID of the object metadata is for.82* @param string$meta_key Metadata key.83* @param mixed$meta_value Metadata value. Must be serializable if non-scalar.84* @param bool$unique Whether the specified meta key should be unique for the object.85*/86$check=apply_filters("add_{$meta_type}_metadata",null,$object_id,$meta_key,$meta_value,$unique);87if(null!==$check){88return$check;89}9091if($unique&&$wpdb->get_var(92$wpdb->prepare(
History
Introduced in 3.1.0. One change between 6.7.7 and 7.1.0.