It will require some neat cURL work with SSL. Also anyone with FTP access or some sort of exploit will be able to see your paypal passwords....
You would need to spend quite some time debugging skype to figure out what to hook or intercept. I think it would be easier to attempt and read...
$50 no design I don't do designs
What makes zend and ioncube and all that special is the fact that they are modules... If you are saying that your php script doesn't use any...
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