Change the cart item quantity for specific products in woocommerce

17,776

To change quantities, see after that code. Here your revisited code:

foreach( WC()->cart->get_cart() as $cart_item_key => $cart_item ) { 
    $product = $cart_item['data']; // Get an instance of the WC_Product object
    echo "<b>".$product->get_title().'</b>  <br> Quantity: '.$cart_item['quantity'].'<br>'; 
    echo "  Price: ".$product->get_price()."<br>";
} 

Updated: Now to change the quantity on specific products, you will need to use this custom function hooked in woocommerce_before_calculate_totals action hook:

add_action('woocommerce_before_calculate_totals', 'change_cart_item_quantities', 20, 1 );
function change_cart_item_quantities ( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
        return;

    // HERE below define your specific products IDs
    $specific_ids = array(37, 51);
    $new_qty = 1; // New quantity

    // Checking cart items
    foreach( $cart->get_cart() as $cart_item_key => $cart_item ) {
        $product_id = $cart_item['data']->get_id();
        // Check for specific product IDs and change quantity
        if( in_array( $product_id, $specific_ids ) && $cart_item['quantity'] != $new_qty ){
            $cart->set_quantity( $cart_item_key, $new_qty ); // Change quantity
        }
    }
}

Code goes in function.php file of the active child theme (or active theme).

Tested and works

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17,776
lalaland
Author by

lalaland

Updated on July 22, 2022

Comments

  • lalaland
    lalaland over 1 year

    Can I change WooCommerce quantity in some specific product?

    I have tried:

    global $woocommerce;
        $items = $woocommerce->cart->get_cart();
        foreach($items as $item => $values) { 
            $_product = $values['data']->post; 
            echo "<b>".$_product->post_title.'</b>  <br> Quantity: '.$values['quantity'].'<br>'; 
            $price = get_post_meta($values['product_id'] , '_price', true);
            echo "  Price: ".$price."<br>";
        } 
    

    How to get specific product Id in cart?

  • Anil Sharma
    Anil Sharma over 3 years
    For me the quantity is updating but the price is gone I am using this for the composite group products. Can you help me on this
  • LoicTheAztec
    LoicTheAztec over 3 years
    @AnilSharma As Composite products as part of a a third party plugin, this code doesn't handle this custom product type. You need to adapt it to your needs.
  • Anil Sharma
    Anil Sharma over 3 years
    Can you guide me to achieve this.
  • LoicTheAztec
    LoicTheAztec over 3 years
    @AnilSharma Maybe ask a new question in StackOverFlow for Composite products…