Development:Enrolment plugins

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Testing paypal using the paypal developer sandbox (for moodle 1.6)

create a paypal developer account at https://developer.paypal.com/cgi-bin/devscr?cmd=_home
change the address being used to send data to paypal to use the sandbox. in enrol/paypal/enrol.html:
* change the form post action to be https://www.sandbox.paypal.com/cgi-bin/webscr instead of https://www.paypal.com/cgi-bin/webscr
change the address that is used to check the acknowledgment from paypal. in enrol/paypal/ipn.php, change:
- $fp = fsockopen ('www.paypal.com', 80, $errno, $errstr, 30);

to

- $fp = fsockopen ('www.sandbox.paypal.com', 80, $errno, $errstr, 30);
create a couple of user accounts in the paypal sandbox and test enrolling in a course that requires payment (note that you need to be logged into the paypal sandbox while doing this testing)