Not getting score the correct way

[topflight]

I am creating an exam and for some reason when I get all the questions right it still says 33 or 0 here is my code

 

 

exam.php

 

<?php
include(db.php");
?>


<?php



$elist = mysql_query("SELECT * FROM `entrance_exam` ORDER BY rand()");

$elrows = mysql_num_rows($elist);

if ($elrows > '0'){
?>

<table width="100%">
<?php 

while ($elr = mysql_fetch_array($elist)){

$counter = $counter + 1;

?>
<form action="?page=correct_exam" method="post"/>
<?php

echo "<tr bgcolor=#4c7cb2><td><font color=white><b>$counter. $elr[Question]</b></font></tr>";

echo " <tr bgcolor=#EEEEEE><td>A:<input type=radio name=$elr[id] value=a> $elr[A]</td></tr>";

echo "<tr bgcolor=#EEEEEE><td>B:<input type=radio name=$elr[id] value=b> $elr[b]</td></tr>";

if ($elr[C]){ echo " <tr bgcolor=#EEEEEE><td>C:<input type=radio name=$elr[id] value=c> $elr[C]</td></tr>"; }

if ($elr[D]){ echo " <tr bgcolor=#EEEEEE><td>D:<input type=radio name=$elr[id] value=d> $elr[D]</td></tr>"; }



}



echo "<tr><td><input type=submit value=\"Submit Exam\"></td></tr>";

echo "<input type=hidden name=now value=$now>";

echo "<input type=hidden name=viewexam value=yes>";
} else { echo'No Questions in database'; }
?>

</table></form>

 

correct_exam.php

<?php
include("db.php");

$a1 = $_POST[1];

$a2 = $_POST[2];

$a3 = $_POST[3];





if ($a1 == 'b'){ $correct = $correct + 1; }

if ($a2 == 'b'){ $correct = $correct + 1; }

if ($a3 == 'a'){ $correct = $correct + 1; }



$s1 = $correct / 3;

$s2 = $correct * 100;

$s3 = round($correct,0);




?>


Your socre was <?php echo"$s3";?>

[ignace]

$a1 = $_POST[1];
$a2 = $_POST[2];
$a3 = $_POST[3];

 

Doesn't work. Therefor this never gets executed:

 

if ($a1 == 'b'){ $correct = $correct + 1; }
if ($a2 == 'b'){ $correct = $correct + 1; }
if ($a3 == 'a'){ $correct = $correct + 1; }

 

$correct doesn't get defined and when you divide it by 3 it has the value 0 (null to integer = 0) divided by 3 = 0 * 100 = 0. $s3 = 0; The reason that you also get 33 is because it somehow passes one if statement whereby $correct = 1 / 3 = 0.333333.. * 100 = round(33.333333..) = 33.

 

Edit: I'm currently figuring out which if statement can pass and how.

[topflight]

$a1 = $_POST[1];
$a2 = $_POST[2];
$a3 = $_POST[3];

 

Doesn't work. Therefor this never gets executed:

 

if ($a1 == 'b'){ $correct = $correct + 1; }
if ($a2 == 'b'){ $correct = $correct + 1; }
if ($a3 == 'a'){ $correct = $correct + 1; }

 

$correct doesn't get defined and when you divide it by 3 it has the value 0 (null to integer = 0) divided by 3 = 0 * 100 = 0. $s3 = 0; The reason that you also get 33 is because it somehow passes one if statement whereby $correct = 1 / 3 = 0.3333333 * 100 = round(33.33) = 33

 

so how can i fix it?

[ignace]

$elr[id] to answers[$elr[id]]

 

access using: $_POST['answers'][..] = (a|b|c|..)

[topflight]

confused lol please give an example.

[topflight]

any other help please