From the promotional people at PHPCon:

Just a few updates about PHPCon we wanted to share with your visitors: Early Bird Registration ends March 31st. That's only 12 days from now! Save nearly $200 when you pick up the Conference Package(Tutorials + all the General Sessions). Also, check out the interviews with John Coggeshall and the php|architect authors.

If you're a part of a special group, you can get a discount too! PHPCon has reduced fees available to the following groups: PHP Association and User Group Members get 20% off, Students get 50% off, University Faculty and Staff get 25% off, and Employees of Non-Profit organizations get 25% off. And, of course, there are travel and lodging discounts you can find here with special PHPCon rates with American Airlines, Amtrack, and the Park Central New York Hotel.