add_(meta_type)_meta │ action-hook │ WP 3.1.0

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

Usage

add_action( 'add_(meta_type)_meta', 'wp_kama_add_meta_type_action', 10, 3 );

/**
 * Function for `add_(meta_type)_meta` action-hook.
 * 
 * @param int    $object_id   ID of the object metadata is for.
 * @param string $meta_key    Metadata key.
 * @param mixed  $_meta_value Metadata value.
 *
 * @return void
 */
function wp_kama_add_meta_type_action( $object_id, $meta_key, $_meta_value ){

	// action...
}

$object_id(int)

ID of the object metadata is for.

$meta_key(string)

Metadata key.

$_meta_value(mixed)

Metadata value.

Changelog

Where the hook is called

do_action( "add_{$meta_type}_meta", $object_id, $meta_key, $_meta_value );

Where the hook is used in WordPress