How to call WooCommerce update cart function programatically

I am rendering WooCommerce Cart items in a custom html table wrapper by a form that points to a custom PHP file.

<form class="woocommerce-cart-form" action="/update-cart.php" method="POST">
    ...
    <input type="submit" name="update_cart" value="Update cart">
</form>

When I click on update cart, I get redirected via POST to update-cart.php where I do some business related actions with the PHP $_REQUEST.

After doing those actions, I want to call to the WooCommerce original update action, but I am stucked.

This is what I have tried:

// Non of this has worked for me

do_action('woocommerce_update_cart_action_cart_updated'); // 1

WC()->cart->persistent_cart_update(); // 2

do_action('update_cart_action'); // 3

How should I call WooCommerce’s update action?

Thank you.

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Answers:

Method 1

Answers:

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Method 1

The default form handler is a static method which you can call with

WC_Form_Handler::update_cart_action();

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