TOPIC 4B-1

VERY INTERESTING - COMPLETED

Completed.

Completed.

Question:
How does one display errors on the page where the data is being entered? At the moment, a new page is being displayed with the error messages and the user has to use the [Back] button to go to the form to correct these errors.

You can use Javascript (not part of this course though) - lots of free code is available that will handle that. A PHP way is to check on the next page if any variable is empty, in which case you send the user back to previous page (or a new page) together with the rest of the variables that was indeed sent, which is then available to echo in the form.

The Javascript engine is built into the browser, therefore it can evaluate a page before the page is being sent to a server. PHP sits on the server, therefore the page is only evaluated once it reaches the server. Thus you have to work with two pages.

Topic completed.

Topic 4B-1 completed.

4B1 completed

Completed! Client side scripting really helps with form validation!

done

Just a reminder that Javascript has some security issues - do a Google for more info. PHP itself, by the way, also has some distant security issues, especially when using forms. Be aware and do a Google search for more info.