Php if cart is not empty

<?php add_action( 'wp_footer', 'vazio' );
    function vazio() {
        if ( ! WC()->cart->is_empty() ) { ?>
        <div style="width: 20%;" class="footer-section <?php echo esc_html($woo);?>">
            <a href="<?php echo 'https://my_web_page.pt/finalizar-compra';?>" title="Finalizar Compra"><i class="fa fa-credit-card"></i></a>
        </div>
    <?php   }
    } ?>

Source: stackoverflow.com

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