The pin numbers are listed in the database one entry per line and when purchase is made, PayPal sends IPN to the plugin.
Setting in Lower Limit entry box causes email to be sent to the administrator when the number of key codes has been reached..
The best way to test the application is to use second PayPal account as that tests the complete system.
This will create file which details IPN results and other messages to show the path through the application...
If you have the version of the plugin, Deactivate and Delete it before you install Premium version.
To display PayPal button on your WordPress page, use the short code where x is the record id of the product item.
If you going to use PayPal Sandbox testing environment, you also need to enter PayPal Sandbox email address.
Also note that if you receive purchase which has currency that is not the same as your PayPal default currency, then you have to accept the currency code before the transaction is completed.
The call back url is sent to PayPal from PHP-KeyCodes as part of the submission.
Browse the code, check out SVN repository, or subscribe to the development log by RSS...
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