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Asked: 2026-05-11T12:06:57+00:00

I am not using a pre-made shopping cart, I programming it myself. It works

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I am not using a pre-made shopping cart, I programming it myself. It works perfectly fine 99% of the time, but about once every couple months an order goes through for $0. I cannot figure out why. I make a test purchase with the same product and all the same info and I cannot get it to be $0 for me. I am not sure how to go about trouble shooting this, I do have a disclaimer saying that we do not honor erroneous prices. The client wants this to stop happening though. I am using PHP to do all of this. Since I cannot seem to duplicate the occurnace myself I am finding it hard to get to the bottom of the issue. Can anyone offer some advice on how to troubleshoot this?

Thanks!!

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  1. Ultimately, you’ll want to figure out why this is happening. Without seeing your code, I can’t really help you out much with that. In the short term though, why not just add a sanity check at the end of the checkout process?

    if ( $final_price < 1 ) {     do_epic_fail(); // Show an error, whatever. }
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