<div>
try checking the PayPal API knowledge base<br />
<br />
<a href="https://cms.paypal.com/us/cgi-bin/?&cmd=_render-content&content_ID=developer/howto_api_reference" rel="ugc nofollow">https://cms.paypal.com/us/cgi-bin/?&cmd=_render-content&content_ID=developer/howto_api_reference</a><br />
<br />
a sample of your code would make it easier to find a solution
</div>


try checking the PayPal API knowledge base

https://cms.paypal.com/us/cgi-bin/?&cmd=_render-content&content_ID=developer/howto_api_reference [https://cms.paypal.com/us/cgi-bin/?&cmd=_render-content&content_ID=developer/howto_api_reference]

a sample of your code would make it easier to find a solution

<div>
Thanks pavar,<br />
<br />
I've looked into this a little further and found out my code was a long way short of what is needed. Could you tell me the quickest way to learn about IPN Data transfer and the hidden variables. Is it worth doing the certification course?
</div>


Thanks pavar,

I've looked into this a little further and found out my code was a long way short of what is needed. Could you tell me the quickest way to learn about IPN Data transfer and the hidden variables. Is it worth doing the certification course?

<div>
Thanks pavar,<br />
<br />
This will be helpful.
</div>


<div>
<div class="content wysiwyg-content">
Hello,<br />
<br />
We are selling a product through paypal. I need paypal to pass back a code that I can check against to a page when the payment is complete.<br />
<br />
I tried using the custom variable when creating the button:<br />
<br />
custom=FJ12345<br />
<br />
and then I tried to read it on the other side with $_POST['custom'].<br />
<br />
This did not work. Could somebody explain to me how I can do this or at least point me in the right direction.<br />
<br />
Thanks, <br />
<br />
Daniel.
</div>
</div>


Hello,

We are selling a product through paypal. I need paypal to pass back a code that I can check against to a page when the payment is complete.

I tried using the custom variable when creating the button:

custom=FJ12345

and then I tried to read it on the other side with $_POST['custom'].

This did not work. Could somebody explain to me how I can do this or at least point me in the right direction.

Thanks, 

Daniel.

Paypal variables

Electronic commerce (e-commerce) is the trading in products or services using computer networks, such as the Internet. E-commerce draws on technologies such as mobile commerce, electronic funds transfer (EFT), supply chain management, online transaction processing, electronic data interchange (EDI), inventory management systems, and automated data collection systems. Use this topic to discuss online shopping carts, online marketplaces, and e-commerce platforms.