Change the “Add to Cart” text only on product page in WooCommerce.

This code snippet changes the "Add to Cart" text on the single product page, for all products in WooCommerce. The text is changed to "My Button Text".

PHP

add_filter( 'woocommerce_product_single_add_to_cart_text', 'woo_custom_cart_button_text' ); 
 
function woo_custom_cart_button_text() {
   return __( 'My Button Text', 'woocommerce' );
}