How to display number of correct answers

MjM8082 · September 21, 2011

On my application there is 10 math questions. What I want to do when the test is finished is for it to tell the user how many they got right out of 10. Also how to put this into the database. I have everything else working fine on this application, I just would like to further enhance it by doing this.

This is the code to my application. It is a small application.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Multiplication Test</title>
</head>

<body>

   

    </body>


<?php

	require_once('database.php');
	session_start();






define ('ROWS', 2);
define ('COLS', 5);
define ('MAX_NUMBER', 12);
date_default_timezone_set('America/New_York');



if (isset($_POST['btn_score']))
{

	$result_name= $_POST['result_name'];

	$correct = 0;


	//print_r ($_POST);
	$time1 = $_POST['ts'];
	$time1_object = new DateTime($time1);
	$now = new DateTime();
	$time_span = $now->diff($time1_object);

	$minutes = $time_span->format('%i');
	$seconds = $time_span->format('%s');
	$seconds+= $minutes * 60;

	echo "It took $seconds seconds to complete the test<hr />";



	foreach ($_POST as $problem => $answer)
	{
		if ($problem <> "btn_score" && $problem <> "ts" && $problem <> "result_name")
		{
			//echo "$problem -- $answer <br />";
			$problem = explode('_', $problem);
			$num1 = $problem[2];
			$num2 = $problem[3];



			$right = $num1 * $num2;


			if ($answer != $right)
			{
			echo "$num1 * $num2 = $answer , The right answer is $right<br />";
			}else 
			{
				$correct = $correct + 1;

			}




			}
	}
	$result_score= 0;
	$result_score= ($correct / 10) * 100;

	echo "your score is <br/>$result_score<br/>";

}






{


	$sql = "INSERT INTO results (result_name, result_score, result_date_time) VALUES ('$result_name','$result_score', NOW());";
	$db->exec($sql);

}



	$query		= "SELECT * FROM results WHERE result_name = :result_name ";

	$statement	= $db->prepare($query);
	$statement->bindValue (':result_name', $result_name);
	$statement->execute();
	$results	= $statement->fetchAll();
	$statement->closeCursor();

	echo "<h1>Show Grades for $result_name </h1>";



	foreach ($results as $result)
	{

	echo $result['result_name'] . " " . $result['result_score']. " " . $result['result_date_time'];	
	echo '<br />';  
	}











?>

<h1>Multiplication Test</h1>

<form name="lab5" method="post" action="lab5b.php">
<?php





	$now = new DateTime();
	//echo $now->format('Y-m-d H:i:s');
	echo "<input type='hidden' name='ts' value='" . $now->format('Y-m-d H:i:s') . "'>";
?>
<table border="1" cellspacing="5" cellpadding="5">

<?php


	$no_of_problems = 0;
	for ($row=0; $row<ROWS; $row++)
	{
		echo "<tr>";
		for ($col=0; $col<COLS; $col++)
		{
			$num1 = mt_rand(1,MAX_NUMBER);
			$num2 = mt_rand(1,MAX_NUMBER);

			echo "<td>$num1 * $num2 </td>";
			echo "<td><input type='text' size='2' name=${no_of_problems}_mult_${num1}_${num2}></td>";
			$no_of_problems++;
		}
		echo "</tr>";
	}
	$colspan = 2 * COLS;
	echo "<tr><td colspan=$colspan align='right'><input type='submit' value='Score' name='btn_score'></td></tr>";
?>	

</table> 

<br>
<br>

<label for="result_name">Student Name:</label> 
<input type="text" id="result_name" name="result_name" /><br />	
</form>
<br>
<br>





</body>
</html>

WebStyles · September 21, 2011

And what exactly is not working? what are the errors you're getting?

p.s. you're opening the <body> tag, closing it, and then closing it again at the end of the document...

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How to display number of correct answers

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