Problem

Do not allow customer to checkout if cart amount is under a certain value for products in a specific category.

For example, don’t allow checkout if customer order $100 worth of T’shirts, if T’shirt category is set to $200 minimum.

The code must

• check cart items for a specific product category
• check the $ value is higher than is set in the code
• display a notice when a specific product category is found and the order is lower than X amount.
• and eventually redirect to cart page when user tries to checkout with an order lower than X amount.

Solution

Adding this code to your child theme’s functions.php file.

//Dont allow order if X Category under X amount

add_action( 'woocommerce_check_cart_items', 'check_cart_outlet_items' );
function check_cart_outlet_items() {
    $categories = array('OUTLET'); // Defined targeted product categories
    $threshold  = 30; // Defined threshold amount

    $cart       = WC()->cart;
    $cart_items = $cart->get_cart();
    $subtotal   = $cart->subtotal;
    $subtotal  -= $cart->get_cart_discount_total() + $cart->get_cart_discount_tax_total();
    $found      = false;

    foreach( $cart_items as $cart_item_key => $cart_item ) {
        // Check for specific product categories
        if ( has_term( $categories, 'product_cat', $cart_item['product_id'] ) ) {
            $found = true; // A category is found
            break; // Stop the loop
        }
    }

    if ( $found && $subtotal < $threshold ) {
        // Display an error notice (and avoid checkout)
        wc_add_notice( sprintf( __( "You must order at least %s" ), wc_price($threshold) ), 'error' );
    }
}