Getting minimum order amount for 'Free Shipping' method in checkout page

Question

I have did tried to use the code from this answer:
How to get minimum order amount for free shipping in woocommerce

But it return a NULL

Answer 1

These 2 filters allow you to get the minimum order amount or even to change its value:

• woocommerce_shipping_free_shipping_instance_option
• woocommerce_shipping_free_shipping_option

You could use it like this for example:

add_filter( 'woocommerce_shipping_free_shipping_instance_option', 'get_free_shipping_min_amount', 10, 3 );
add_filter( 'woocommerce_shipping_free_shipping_option', 'get_free_shipping_min_amount', 10, 3 );
function get_free_shipping_min_amount( $option, $key, $method ){
    if (
        'min_amount' !== $key ||
        ! is_numeric( $option )     
    ) {
        return $option;
    }
    // Minimum amount
    $min_amount = $option;
    return $option;
}

You can get more info from the shipping method using the $method param like instance_id or something like that if you wish.

You can also replace 'free_shipping' from the hook to get info from other shipping methods. The hook works like this: 'woocommerce_shipping_' . $shipping_method_id . '_option'.

You can take a look at it on the documentation:

• https://docs.woocommerce.com/wc-apidocs/source-class-WC_Shipping_Method.html#469
• https://docs.woocommerce.com/wc-apidocs/source-class-WC_Shipping_Method.html#495