replace add to card by whatsapp

// The custom replacement button function
function custom_product_button(){
    // HERE your custom button text and link
    $button_text = __( "WhatSapp", "woocommerce" );
    $button_link = "https://web.whatsapp.com/send?phone=+221785421818&text=Votre%20annonce%20publi%C3%A9e%20sur%20AdafriMarket%20m%27int%C3%A9resse.%20https://sn.coinafrique.com/annonce/demandes-demploi/demande-demploi-boy-2512208";

    // Display button
    echo '<a class="button" target="_blank" href="'.$button_link.'">' . $button_text . '</a>';
}

// Replacing the single product button add to cart by a custom button for a specific product category
add_action( 'woocommerce_single_product_summary', 'replace_single_add_to_cart_button', 1 );
function replace_single_add_to_cart_button() {
    global $product;

    // Only for product category ID 64
    /*if( has_term( '64', 'product_cat', $product->get_id() ) ){
		put the code over here
    }*/
	
	// For variable product types (keeping attribute select fields)
	if( $product->is_type( 'variable' ) ) {
		remove_action( 'woocommerce_single_variation', 'woocommerce_single_variation_add_to_cart_button', 20 );
		add_action( 'woocommerce_single_variation', 'custom_product_button', 20 );
	}
	// For all other product types
	else {
		remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_add_to_cart', 30 );
		add_action( 'woocommerce_single_product_summary', 'custom_product_button', 30 );
	}
	
}