function my_em_add_fee($paypal_vars, $EM_Booking, $EM_Gateway_Paypal){
$amount = 30;
if ( !empty($amount) ){
$itemcount = (count($EM_Booking->get_tickets_bookings()->tickets_bookings) + 1);
$paypal_vars['item_name_'.$itemcount] = wp_kses_data("Paypal Fee");
$paypal_vars['quantity_'.$itemcount] = 1;
$paypal_vars['amount_'.$itemcount] = $amount;
}
return $paypal_vars;
}
add_filter('em_gateway_paypal_get_paypal_vars','my_em_add_fee',1,3);
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