CREATE TABLE quiz (
id tinyint(4) NOT NULL auto_increment,
q text NOT NULL,
question text NOT NULL,
opt1 text NOT NULL,
opt2 text NOT NULL,
opt3 text NOT NULL,
answer text NOT NULL,
PRIMARY KEY (id)
) TYPE=MyISAM;

<?php

include("contentdb.php");

$display = mysql_query("SELECT * FROM $table ORDER BY RAND() LIMIT=40",$db);
   
if (!$submit) {


   echo "<form method=post action=$PHP_SELF>";
   echo "<table border=0>";

   while ($row = mysql_fetch_array($display)) {

   $id = $row["id"];
   $question = $row["question"];
   $opt1 = $row["opt1"];
   $opt2 = $row["opt2"];
   $opt3 = $row["opt3"];
   $answer = $row["answer"];

   echo "<tr><td colspan=3><br><b>$question</b></td></tr>";
   echo "<tr><td>$opt1 <input type=radio name=q$id value=\"$opt1\"></td><td>$opt2 <input type=radio name=q$id value=\"$opt2\"></td><td>$opt3 <input type=radio name=q$id value=\"$opt3\"></td></tr>";

   }

   echo "</table>";
   echo "<input type='submit' value='See how you did' name='submit'>";
   echo "</form>";

}

elseif ($submit)

{

   $score = 0;
   $total = mysql_num_rows($display);
      while ($result = mysql_fetch_array($display))
      
      
      {
      
         $answer = $result["answer"];
         $q = $result["q"];
         
      if ($$q == $answer)
      {
      $score++;
      }
   
   }
   
   echo "<p align=center><b>You scored $score out of $total</b></p>";
   echo "<p>";
   
   if   ($score == $total) {
   echo "Congratulations! You got every question right!";
   }
   elseif ($score/$total < 0.34) {
   echo "Oh dear. Not the best score, but don't worry, it's only a quiz.";
   }
   elseif ($score/$total > 0.67) {
   echo "Well done! You certainly know your stuff.";
   }
   else {
   echo "Not bad - but there were a few that caught you out!";
   }

echo "</p>";

echo "<p>Here are the answers:";

echo "<table border=0>";
$display = mysql_query("SELECT * FROM $table ORDER BY RAND() LIMIT=40",$db);
while ($row = mysql_fetch_array($display)) {

$question = $row["question"];
$answer = $row["answer"];
$q = $row["q"];

echo "<tr><td><br>$question</td></tr>";

if ($$q == $answer)
      {
      echo "<tr><td>&raquo;you answered ${$q}, which is correct</td></tr>";
      }
elseif ($$q == "") {
echo "<tr><td>&raquo;you didn't select an answer. The answer is $answer</td></tr>";
}
else {
echo "<tr><td>&raquo;you answered ${$q}. The answer is $answer</td></tr>";
}

}
echo "</table></p>";



}

?>