Need Help

[eluser]kre8ivdesigns[/eluser]
Any books to help out.. I havent programmed since 1998 and been trying to get back in the game. Have WROX PHP5 beginners, PHP5 and MySql Beginners, and Codeigniter Shopping Cart. Thanks for your help and I have written more since this last post and had to change some code:
1. Had to check to see if database was empty first. If it was then allowed the customer to add dates if not then would check dates - This was for the start of the program
2.Had to validate the number of nights and if they accidently put in 0 then it would tell them to check it
3. For reservations I have the client looks up by confirmation number which is a random number generated at the end. Right now clients can see only the reservation based of the the confirmation number they have. If you see anything I can reduce the code would be great.

THANKS FOR ALL THE HELP!!!!