Update total Woocommerce Checkout based on payment method

I have a problem when I try to update woocommerce total based on payment method on checkout page. In my case I need to apply a discount if customer select paypal or credit card. The strange thing is that the most of times the code works corrrectly but for about 20-25% of order it doesn't work. This is my code to trigger the update: add_action( 'wp_footer', 'refresh_payment_methods', 20, 1 ); function refresh_payment_methods() { ?> <script type="text/javascript"> (function($){ $( 'form.checkout' ).on( 'change', 'input[name^="payment_method"]', function() { $('body').trigger('update_checkout'); }); }); </script> <?php } ?> This is the code that manage the discount: /* APPLY DISCOUNT BASED ON PAYMENT METHOD */ add_action('woocommerce_checkout_update_order_review', 'payment_method_discount', 10, 2); add_action( 'woocommerce_cart_calculate_fees', 'payment_method_discount', 20, 1 ); function payment_method_discount( $cart_object ) { if ( is_admin() && !defined( 'DOING_AJAX' ) ) return; foreach($cart_object->cart_contents as $cart_item_id => $cart_item) { $riepilogo = json_decode(stripslashes($cart_item['_dettagli_noleggio'])); $payment_method_arr = array('ppcp-gateway' ,'axepta'); $chosen_payment_method = WC()->session->get('chosen_payment_method'); if(in_array($chosen_payment_method, $payment_method_arr)) { $discount = number_format( ($riepilogo->noleggio->prezzo_noleggio / 100) * $percent , 2); WC()->cart->add_fee( 'Sconto pagamento online', 0 - $discount ); $riepilogo->noleggio->prezzo_noleggio_scontato = number_format( $riepilogo->noleggio->prezzo_noleggio - $discount , 2, '.',''); $riepilogo->noleggio->prezzo_totale_scontato = number_format( $riepilogo->noleggio->prezzo_noleggio_scontato + $riepilogo->noleggio->prezzo_accessori + $riepilogo->noleggio->prezzo_assicurazione, 2, '.',''); $cart_object->cart_contents[$cart_item_id]['_dettagli_noleggio'] = json_encode($riepilogo); }else{ $fees = WC()->cart->get_fees(); foreach ($fees as $key => $fee) { unset($fees[$key]); } WC()->cart->fees_api()->set_fees($fees); $riepilogo->noleggio->prezzo_noleggio_scontato = ""; $riepilogo->noleggio->prezzo_totale = number_format( $riepilogo->noleggio->prezzo_noleggio + $riepilogo->noleggio->prezzo_accessori + $riepilogo->noleggio->prezzo_assicurazione, 2,'.',''); $riepilogo->noleggio->prezzo_totale_scontato = ''; $cart_object->cart_contents[$cart_item_id]['_dettagli_noleggio'] = json_encode($riepilogo); } } } I think the cause of the problem is related to the saving times in the database. When I go on paypal or credit card page I get the full price instead of the discounted value. Any suggest or best approach to do it?

First, in your code, the $percent variable is not defined. Your question is not really clear (missing context) and your code is not testable. What is behind $cart_item['_dettagli_noleggio'] and how do you set it? Based on this answer code, try the following revised and simplified code: add_action( 'woocommerce_checkout_init', 'payment_method_change_trigger_update_checkout_js' ); function payment_method_change_trigger_update_checkout_js() { wc_enqueue_js("$('form.checkout').on( 'change', 'input[name=payment_method]', function(){ $(document.body).trigger('update_checkout'); });"); } add_action( 'woocommerce_cart_calculate_fees', 'payment_method_discount', 20, 1 ); function payment_method_discount( $cart ) { if ( is_admin() && !defined( 'DOING_AJAX' ) ) return; $percent = 10; // HERE define the percentage $payment_methods = array('ppcp-gateway' ,'axepta'); // HERE define the allowed payment IDs $chosen_payment = WC()->session->get('chosen_payment_method'); $discount = 0; // Initializing foreach( $cart->get_cart() as $item_key => $item ) { if ( isset($item['_dettagli_noleggio']) && in_array($chosen_payment, $payment_methods) ) { $rent_data = json_decode(stripslashes($item['_dettagli_noleggio'])); $discount -= number_format( ($rent_data->noleggio->prezzo_noleggio / 100) * $percent , 2); } } if ( $discount < 0 ) { $cart->add_fee( 'Sconto pagamento online', $discount ); } } Or for multiple separated discounts, replace the 2nd function with: add_action( 'woocommerce_cart_calculate_fees', 'payment_method_discount', 20, 1 ); function payment_method_discount( $cart ) { if ( is_admin() && !defined( 'DOING_AJAX' ) ) return; $percent = 10; // HERE define the percentage $payment_methods = array('ppcp-gateway' ,'axepta'); // HERE define the allowed payment IDs $chosen_payment = WC()->session->get('chosen_payment_method'); foreach( $cart->get_cart() as $item_key => $item ) { if ( isset($item['_dettagli_noleggio']) && in_array($chosen_payment, $payment_methods) ) { $rent_data = json_decode(stripslashes($item['_dettagli_noleggio'])); $discount = number_format( ($rent_data->noleggio->prezzo_noleggio / 100) * $percent , 2); $cart->add_fee( 'Sconto pagamento online', -$discount ); } } } Code goes in functions.php file of your child theme (or in a plugin). It could work.

December 29, 2023