Custom checkbox – add hook for validation

Hi @kosak

The validation of this required checkbox works fine for wire transfers but, unfortunately, not for the PayPal button. 

That’s because the wire transfers gateway just relies on the core WooCommerce validations, it doesn’t do anything special so comparing the two plugins doesn’t make sense. If you were using the Use Place Order Button option in the PayPal plugin, then you would observer that same validation being triggered.

Since it sounds like you’re using the PayPal smartbutton, you should use action wc_ppcp_checkout_validation. If you were adding your custom field using WooCommerce core filters like woocommerce_checkout_fields the PayPal plugin would know to include that in the validation. But since you aren’t you need to tell the plugin what to validate for your custom field.

Example:

add_action('wc_ppcp_checkout_validation', function($validator, $request){
    if ( ! (int) isset( $request['checkout_checkbox'] ) ) {
        $validator->add_error( __( 'Please accept the terms and condition.' ));
    }
}, 10, 2);

Kind Regards

@kosak I believe the formatting in your custom code is incorrect. Notice that your editor highlights strings in yellow but the filter wc_ppcp_checkout_validation is shown in red.