APO-Epsilon/apo-website

<?php
require_once ('session.php');
require_once 'mysql_access.php';

$response=$db->query("SELECT id,question_name,answer FROM questions");
   $i=1;
   $right_answer=0;
   $wrong_answer=0;
   $unanswered=0;
   $user_id = $_SESSION['sessionID'];
   while($result=mysqli_fetch_array($response)){
         if($result['answer']==$_POST["$i"]){
           $right_answer++;
       }else if($_POST["$i"]==5){
           $unanswered++;
       }
       else{
           $wrong_answer++;
       }
       $i++;
   }
   echo "<div id='answer'>";
   echo " Right Answer  : <span class='highlight'>". $right_answer."</span><br>";
   echo " Wrong Answer  : <span class='highlight'>". $wrong_answer."</span><br>";
   echo " Unanswered Question  : <span class='highlight'>". $unanswered."</span><br>";
   echo "</div>";
   if ($right_answer >= ($i-1)) {
    $sql = "UPDATE `contact_information` SET `risk_management`=CURDATE() WHERE id='$user_id'";
    $update = $db->query($sql);
    echo "<h2>You have passed the quiz! </h2>";
   }

/*$limit=$_POST['question_num'];
//$limit1=$limit+1;
$response=mysql_query("select * from questions");

$data=array();
$data1=array();
while($result=mysql_fetch_array($response)){
$data['question_name']=$result['question_name'];
$data['answer1']=$result['answer1'];
$data['answer2']=$result['answer2'];
$data['answer3']=$result['answer3'];
$data['answer4']=$result['answer4'];
$data['answer']=$result['answer'];
$data['id']=$result['id'];
array_push($data1, $data);
$data="";
}
$a=json_encode($data1);
echo $a;*/
?>