EE3 - Modified function to make additional attendees free

custom_functions.php

//Please note that this is a non supported code snippet. Event Espresso will not provide general support for it, nor may it be updated. 
//Please only use as an example for your own code


function espresso_make_additional_relay_teammates_free ($ext_att_data_source) {
    global $wpdb;

	//As this function is called for each attendee, lets bail if it's the primary attendee.
	if( $ext_att_data_source['is_primary'] == true ) {
		return;
	}

    //add to a variable just in case
    $y = $ext_att_data_source['attendee_id'];

    $attendee = $wpdb->get_row("SELECT * FROM " . EVENTS_ATTENDEE_TABLE . " WHERE id= $y", ARRAY_A);

    //add to a variable just in case.
    $x = $attendee['registration_id'];

    $teammate = $wpdb->get_row("SELECT * FROM " . EVENTS_ATTENDEE_TABLE . " WHERE registration_id =  '$x' ", ARRAY_A);

    if ($teammate['is_primary'] != 1 ) {
        $wpdb->update(EVENTS_ATTENDEE_TABLE,
                array('final_price'=>'0.00'),
                array('id'=>$teammate['id']),
                array('%s'),
                array('%d'));
    }



}
 
add_action('action_hook_espresso_save_attendee_data', 'espresso_make_additional_relay_teammates_free');