PHP : ONline quiz problem

devansh · 09-17-2004, 10:15 AM

Hi,
I got a doubt in PHP.
I am preparing an online quiz . In this quiz questions will be served to user one by one . Questions are stored in database, and each time when PHP script runs a random number is generated and question corresponding to that index is served to user.
Suppose user is to be served with 10 questions. He attempted first question, and now he is attempting second one, now when user is attempting second question i don't want the user to get back on previous page by pressing back button, means i don't want the user to see that question which he has already attempted again, by pressing BACK button. Suppose if user presses BACK button, then the previous page which may be stored in cache should not be displayed , instead of that if user presses BACK button then some error message should be displayed , like "THIS PAGE HAS BEEN EXPIRED , PLEASE PRESS FORWARD BUTTON TO CONTINUE THE QUIZ".
Could anyone tell me how can i implement this thing ?
I will prefer the the solution with some code segment.
I think i am able to explain my question clearly , in case i am not, then plz ask........

My EmailID = devanshmittal163@yahoo.co.in

kev82 · 09-17-2004, 10:57 AM

read setion 14.21 of this it tells you all about the expires header if you set it to zero then hopefully the page shouldnt be cached and each access including back should cause a reload. you can do this with the header() command, if your unfamiliar look it up on php.net its quite simple

ok, now what you need is to use session variables to store the question the player is supposed to be answering then whenever the page is reloaded display the current question.

just incase the the player is tricky, eg downloading the question page before answering/etc... dont let him submit answers you already have in your session variables.

i think ive explined it well enough but if you like code then here it is again in psuedo-code

Code:

send_header(expires immediatly)

if(current_question_submitted) {
    current_question=next_question
}

display_current_question()

devansh · 09-20-2004, 03:27 AM

I did'nt get your reply