Please help convert into array

I need to add 10/03/12, 10/04/12, 10/05/12, 10/06/12, 10/07/12, 10/08/12, 10/09/12, 10/10/12 to an array

and then check if coupon code = 10off and $_POST['date'] = one of the dates above.

I know I need to convert it into an array but I can't figure out how even after researching.

Can someone please help me out with this?

Thank you for the help.

Is the coupon going to be valid on the 14th of this month? How about in November? Next year?

Should only be good until october 10 2012

So basically, if the "date" post is between today and October 10, 2012 ... continue on but if not then die;

Or more simply "if it's after October 10, 2012".

But before I go to the easy solution, why are you getting the date from $_POST? Don't you want to use today's date?
[edit] I may have misread a bit but still the underlying issue stands: can't someone just enter whatever valid date they want and get access?

this is used for appointments. on the previous step the user chooses a date for the appointment and uses the coupon to get a discount but it must be scheduled on an allowed date.

I actually just realized that there are, in fact, three different dates in play. Right? I still think you can just go with a "if it's before October 10" (because they can't make an appointment in the past).

But anyway no, then, they can't put in arbitrary dates. You can compare dates really easily if you convert them into YYYY/MM/DD format (because MM/DD/YY doesn't work). For example,

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