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Re: Want your query_string() sorted or unsorted?

by scorpio17 (Canon)
on Aug 13, 2009 at 14:38 UTC ( [id://788312]=note: print w/replies, xml ) Need Help??

in reply to Want your query_string() sorted or unsorted?

Are you familiar with PayPal's IPN (instant payment notification) system? The idea is that if you have an e-commerce site, and someone chooses to pay via paypal, paypal can notify you when it gets a payment. To help prevent abuse, your payment processing script has to send back an acknowledgment to paypal - this has to contain all the same parameters, IN THE SAME ORDER. If all goes well, you get back a 'verified' signal, and can complete the transaction. Else you know something has gone wrong, etc. But if changed the order of the parameters in the query string, this would cause a problem. At least, I know it would break MY paypal IPN processing script (and probably that of a lot of other people). If you add this feature, I suggest making it a) optional, and b) NOT the default. Thanks!
  • Comment on Re: Want your query_string() sorted or unsorted?

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