osCommerce and Authorize.net
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I've been working on some stores which use the AIM version of Authorize. It's a decent payment system as far as I can see.
I installed my disocunt coupon system on the store, and tested a purchase via Authorize. The discount amount was not picked up...so a quick hunt in the osCommerce forum led me to this post from vGer where the fix is shown.
Basically, you have to move 1 line of code. So open up checkout_process.php and find this:
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// load the before_process function from the payment modules
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$payment_modules->before_process();
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require(DIR_WS_CLASSES . 'order_total.php');
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$order_total_modules = new order_total;
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$order_totals = $order_total_modules->process();
and change it to this:
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require(DIR_WS_CLASSES . 'order_total.php');
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$order_total_modules = new order_total;
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$order_totals = $order_total_modules->process();
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// load the before_process function from the payment modules
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$payment_modules->before_process();
In effect what we are doing is loading the order_totals before the payment modules - so that the payment module Authorize.net can pick up any changes to the order_totals before asking for the correct payment amount.
Thanks, vGer.