Wordpress Woocommerce out of stock, backorder

woocommerce-functions.php

//Backorder
function backordertext($available) {
    foreach ($available as $i) {
        $available = strreplace('Available on backorder', 'This item is currently only available for backorder.  Please allow 30-45 days from time of order for delivery.', $available);
    }
    return $available;
}

addfilter('woocommercegetavailability', 'backordertext');

//Out of Stock
add_filter('woocommerce_get_availability', 'availability_filter_func');

function availability_filter_func($availability) {
    $availability['availability'] = str_ireplace('Out of stock', 'This item is currently out of stock.  Please check back again at a later date."', $availability['availability']);
    return $availability;
}