For complex web development, we make heavy use of PHP. Theres an embarrassment of riches as far as PHP books and resources go.
http://www.php.net
This is the official PHP project website, home to tutorials, to the annotated online manual (a great resource), the PHP software itself, and links to many other useful sites and resources.
http://www.zend.com
Zend is a commercial entity, founded by some of the core authors and developers of PHP, that sells a number of tools for working with and enhancing PHP.
For books, you might look at Learning PHP 5 by David Sklar (ISBN: 0-59600-560-1). As your learning progresses, youll definitely want to look at Advanced PHP Programming by George Schlossnagle (ISBN: 0-67232-561-6).
: FileMaker Specifications
FileMaker 8 Product Line
Specifications and Storage Limits
Field Types and Import/Export Formats
: Calculation Functions
Working with Calculations Primer
Calculation Signatures
Calculation Functions
: Custom Functions
Custom Functions Primer
Useful Custom Functions
: Script Steps
Scripting Primer
Script Step Reference
: Quick Reference
FileMaker Error Codes
FileMaker Keyboard Shortcuts
FileMaker Network Ports
FileMaker Server Command Line Reference
FileMaker XML Reference
: Other Resources
Where to Go for More Information