Fires immediately before meta of a specific type is added. 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).

Possible hook names include:

– `add_post_meta` – `add_comment_meta` – `add_term_meta` – `add_user_meta`

Parameters

.

( 3.1.0 ) . .

( int ) $object_id ID of the object metadata is for. . . .

$meta_key

( string ) Metadata key. . . .

( mixed ) $_meta_value Metadata value. . . .