Section 9.1. Introduction
Recipe 9.2. Processing Form Input
Recipe 9.3. Validating Form Input
Recipe 9.4. Working with Multipage Forms
Recipe 9.5. Redisplaying Forms with Preserved Information and Error Messages
Recipe 9.6. Guarding Against Multiple Submission of the Same Form
Recipe 9.7. Processing Uploaded Files
Recipe 9.8. Securing PHP's Form Processing
Recipe 9.9. Escaping Control Characters from User Data
Recipe 9.10. Handling Remote Variables with Periods in Their Names
Recipe 9.11. Using Form Elements with Multiple Options
Recipe 9.12. Creating Dropdown Menus Based on the Current Date
