Dynamic Arrays

[riex]

I am trying to create a quiz that checks an anwser against a MySQL database and if the anwser is wrong it places the wrong anwser and the correct anwser in an array that is to be added to through out the quiz. I was woundering how i could accomplish this because I cant get all the anwsers to appear at the end except for the last incorrect anwser. Is an array a good way to go about this or is there some better way that I don't know about. Please Help if you can.

Riex

[diego25]

You can dynamically create an array element without having to specify the index. e.g. you can do this:

$answer[] = 'a';
$answer[] = 'b';

and that will have the same result as
$answer = arra('a', 'b');

So in your loop, which checks each answer, if the answer is wrong, you just do
$answer[] = $correctValue;

Diego

[riex]

I tried that and it didn't work. I need the array to carry on through multiple pages and as of now it only exists for the current page not previous ones.

[diego25]

You'll have to use sessions, or cookies, or hidden fields to accomplish that.

Diego

[Wells_Wang]

you try this

var $correct = array();
var $answer = array();

$i=0;
while (....)
{
   $answer[$i]=$_POST['answer'.$i]; //get POST request parameter
   $i++;
}

$i=0;
$result=mysql_query(...); //query the database to get the correct answer
while ($record=mysql_fetch_object($result)) {
   $correct[$i]=$record->answer;  //get correct answer array
   $i++;
}

for ($i=0;$i<count($correct);$i++){
   //compare two arrays
   if ($correct[$i]!=$answer[$i]) {
      //.................................
   }
}

FYI