update_{$meta_type}_metadata_by_mid WordPress Filter Hook
This hook is used to update metadata for a given meta type. It takes two parameters, the first being the meta ID of the object to update, and the second being an array of key => value pairs of the metadata to update. This hook is useful for programmatically updating metadata values for a given object. For example, you could use this hook to update the value of a custom field for a post or user.
apply_filters( "update_{$meta_type}_metadata_by_mid",  null|bool $check ,  int $meta_id ,  mixed $meta_value ,  string|false $meta_key  ) #
Short-circuits updating metadata of a specific type by meta ID.
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:
- update_post_metadata_by_mid
- update_comment_metadata_by_mid
- update_term_metadata_by_mid
- update_user_metadata_by_mid
Parameters
- $check
- (null|bool)Whether to allow updating metadata for the given type. 
- $meta_id
- (int)Meta ID. 
- $meta_value
- (mixed)Meta value. Must be serializable if non-scalar. 
- $meta_key
- (string|false)Meta key, if provided. 
Source
File: wp-includes/meta.php
Changelog
| Version | Description | 
|---|---|
| 5.0.0 | Introduced. |