woocommerce-change-booking-header-email.php

/**
 * Add multiple filters to a closure
 *
 * @param $tags
 * @param $function_to_add
 * @param int $priority
 * @param int $accepted_args
 *
 * @return bool true
 * https://snippets.khromov.se/adding-multiple-actions-and-filters-using-anonymous-functions-in-wordpress/
 */
function add_filters($tags, $function_to_add, $priority = 10, $accepted_args = 1)
{
  //If the filter names are not an array, create an array containing one item
  if(!is_array($tags))
    $tags = array($tags);

  //For each filter name
  foreach($tags as $index => $tag)
    add_filter($tag, $function_to_add, (int)(is_array($priority) ? $priority[$index] : $priority), (int)(is_array($accepted_args) ? $accepted_args[$index] : $accepted_args));

  return true;
}

// All filters for booking notifications
add_filters(array(
    // New & Pending Confirmation
    'woocommerce_booking_in-cart_to_paid',
    'woocommerce_booking_in-cart_to_pending-confirmation',
    'woocommerce_booking_unpaid_to_paid',
    'woocommerce_booking_unpaid_to_pending-confirmation',
    'woocommerce_booking_confirmed_to_paid',
    'woocommerce_admin_new_booking',
    'woocommerce_admin_confirmed',

    // Confirmed
    'woocommerce_booking_confirmed',

    // Pending Confirmation
    'woocommerce_booking_pending-confirmation',

    // Cancelled
    'woocommerce_booking_pending-confirmation_to_cancelled',
    'woocommerce_booking_confirmed_to_cancelled',
    'woocommerce_booking_paid_to_cancelled'
), function(){
    add_filter('woocommerce_email_from_address', function( $from_email ){ return 'email@address.com'; });
});