Wordpress function to change Woocommerce In Stock and Out of Stock Text

stock_text.php

<?php
/**
 * Woocommerce Change In Stock and Out of Stock Text
 *
 */
add_filter( 'woocommerce_get_availability', 'rzl_woo_custom_get_availability', 1, 2);
function rzl_woo_custom_get_availability( $availability, $_product ) {

    // Change In Stock Text
    if ( $_product->is_in_stock() ) {
        $availability['availability'] = __('Available', 'woocommerce');
    }
    // Change Out of Stock Text
    if ( ! $_product->is_in_stock() ) {
      $availability['availability'] = __('Sold out', 'woocommerce');
    }
    return $availability;
}