pre_user_id │ filter-hook │ WP 1.5.0

Filters the comment author's user ID before it is set.

The first time this filter is evaluated, user_ID is checked (for back-compat), followed by the standard user_id value.

Usage

add_filter( 'pre_user_id', 'wp_kama_pre_user_id_filter' );

/**
 * Function for `pre_user_id` filter-hook.
 * 
 * @param int $user_id The comment author's user ID.
 *
 * @return int
 */
function wp_kama_pre_user_id_filter( $user_id ){

	// filter...
	return $user_id;
}

$user_id(int)

The comment author's user ID.

Changelog

Where the hook is called

$commentdata['user_id'] = apply_filters( 'pre_user_id', $commentdata['user_ID'] );

$commentdata['user_id'] = apply_filters( 'pre_user_id', $commentdata['user_id'] );

Where the hook is used in WordPress