Hide price, “add to cart” button and show message “Please log in to shop” [closed]

Just put some conditionals where you render your button. You’ll also need to figure out which page you’re on.

if($is_single_product_page) {

    if( ! is_user_logged_in()) { ?>

        <div class="message">Please log in first</div>

    <?php } else { // end is_user_logged_in/false 
    ?>

        <button class="btn">add to cart</button>

    <?php } // end is_user_logged_in/true
}