/*
Theme Name: Crocal Child
Theme URI: https://www.parcel-boxes.co.uk
Template: crocal
Author: Parcel Boxes
Author URI: https://www.parcel-boxes.co.uk
Description: Child theme
Version: 1.1.1616597439
Updated: 2021-03-24 14:50:39

*/
<?php
// To change add to cart text on single product page
add_filter( 'woocommerce_product_single_add_to_cart_text', 'woocommerce_custom_single_add_to_cart_text' ); 
function woocommerce_custom_single_add_to_cart_text() {
    return __( 'Buy Now', 'woocommerce' ); 
}

// To change add to cart text on product archives(Collection) page
add_filter( 'woocommerce_product_add_to_cart_text', 'woocommerce_custom_product_add_to_cart_text' );  
function woocommerce_custom_product_add_to_cart_text() {
    return __( 'Buy Now', 'woocommerce' );
}