Fixed score

[tecmeister]

On the quiz that im creating.  I want to know how to make the users only able to answer a once.

Meaning that they are not able to change their answer once they have gone to there next question.

 

Thanks for your help.

 

tecmeister

[uniflare]

you could try using cookies...mmmmm....cookies.....(easier), or session variables(more secure).

 

For Cookie:

--

give each question page an id

 

on each question page add this to the VERY start of your page (before anything is sent to the browser)

<?php 
$cStr = @$_COOKIE['Cookiename']; 
if(preg_match("/^PageID/",$cStr) == 0){
   setcookie("Cookiename",$cStr.";PageID",time()+86400); 
}else{
   // Could use Header("Location: nextpage.php");exit(); to redirect if the user has already submitted this question.
}
?>

 

replace "Cookiename" with a name of your choice (MUST be same on ALL pages)

also replace "PageID" with a Unique String of Characters for each question page

_

Next Add a Check where you add the points to the score, something like:

<?php
if(preg_match("/^PageID/",$_COOKIE['Cookiename']) != 0){
   // Add or Subtract Player Score
}
?>

 

This way they can still view the page and continue if they accidentally hit the back button. (Assuming you did not use my suggestion for header() redirect)

=====

NOTE: I have not used preg_match and setcookie for a long time i hope this example works

 

 

 

 

__________________________

OR with Session Variables:

 

you are familiar with sessions.

Same Theory, Add a unique ID to each page

 

<?php 
$sStr = @$_SESSION['PID_String']; 
if(preg_match("/^PageID/",$sStr) == 0){
   $_SESSION['PID_String'] .= ";PageID";
}else{
   // Could use Header("Location: nextpage.php");exit(); to redirect if the user has already submitted this question.
}
?>

replace "PageID" with a Unique String of Characters for each question page

_

Next Add a Check where you add the points to the score, something like:

<?php
if(preg_match("/^PageID/",$_SESSION['PID_String']) != 0){
   // Add or Subtract Player Score
}
?>

 

Unfortunately with this alone, all the user has to do is close the browser, of course the user would have to login again - then start again, so if your saving results to a username this should not be a problem.

 

You MAY want to check if $_SESSION['username'] exists (isset() function is handy for this), if it doesn't then redirect to the login/start page.

 

 

_______________________________

Good luck hope it helps