• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

Chapter 13. Validating and Formatting Data

Chapter 13. Validating and Formatting Data

Many applications collect information from users—phone numbers, email addresses, and so on—for later use, or to send to a database where it can be stored and retrieved as needed. However, if these applications trusted users to enter properly formatted, error-free information, they probably wouldn’t function properly—that, or your database would quickly fill with useless data. The fact is, users often enter data incorrectly— which is why it’s a good idea to validate data before it’s used or processed. Validating data usually entails writing a script to check the way data was entered against a set of guidelines or rules. If data-entry errors are found, the user can be prompted to reenter the data, or (in some cases) the script can make the needed adjustments without further input from the user.

Our fictional product contains a product registration form that allows us to collect data from the user, validate it, and display any errors found.


PREVIEW

                                                                          

Not a subscriber?

Start A Free Trial


  
  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint