Giving $_POST[] a value?

[ejwf]

I have a quiz whereby the user fills in a form answering true or false for each question.
I have a radio button for each of the options and want to process the form so that I give the right answer a value of 1 and then add up all the right answers to give a 'total correct' Like Well done you got 10 correct answers out of a possible 12 or Too Bad, you only scored 2 out of 12, better luck next time

I have the code to write the form and another code to process the form so that it gives that answer and says whether you got it right or wrong.
But I dont know where to start in giving the $_POST[] variable a value so that I can add it all up.
Can anyone help.........

[devinemke]

if (!isset($_POST['submit']))
{
	echo '
	<form action="" method="POST">

1. The Earth is flat.
<input type="radio" name="quiz[1]" value="Y">Yes
<input type="radio" name="quiz[1]" value="N">No
<br>
2. The Earth revolves around the Sun.
<input type="radio" name="quiz[2]" value="Y">Yes
<input type="radio" name="quiz[2]" value="N">No
<br>
3. The Sun is flat.
<input type="radio" name="quiz[3]" value="Y">Yes
<input type="radio" name="quiz[3]" value="N">No

<br>
<br>
<input type="submit" name="submit" value="submit">
</form>
';
}

else
{
	if (!isset($_POST['quiz'])) {echo 'You did not fill in any answers';}
	else
	{
		$answers = array(
		1 => 'N',
		2 => 'Y',
		3 => 'N'
		);

	echo 'Here are your results:<br><br>';
	$i = 0;
	foreach ($answers as $key => $value)
	{
		echo 'question #' . $key . ' = ';
		if (!isset($_POST['quiz'][$key])) {echo 'pass';}
		else
		{
			if ($value == $_POST['quiz'][$key]) {echo 'correct'; $i++;}
			else {echo 'incorrect';}
		}
		echo '<br>';
	}
	echo '<br>You got ' . $i . ' out of ' . count($answers) . ' correct.'; 
}
}

[ejwf]

thanks for this
I have been playing around with the code to try to make it match what I am trying to do, but can't quite get there - could you help - thanks;

code on quiz form

       <p>In order to assess your current leadership skill level, please complete 
          the following form.<br>
          Once you have completed this form you will get instant feedback on your 
          results.
        <form name="leadership" method="post" action="process_leadership.php">
          <table width="100%" border="0" cellspacing="0" cellpadding="5">
            <tr bgcolor="#FFEFE8"> 
              <td width="13%">First Name:</td>
              <td colspan="2"> <b> 
                <input type="text" name="first_name" size="40">
                </b></td>
            </tr>
            <tr bgcolor="#FFEFE8"> 
              <td width="13%">Second Name:</td>
              <td colspan="2"> <b> 
                <input type="text" name="second_name" size="40">
                </b></td>
            </tr>
            <tr bgcolor="#FFEFE8"> 
              <td width="13%">E-Mail:</td>
              <td colspan="2"> <b> 
                <input type="text" name="email" size="40">
                <br>
                </b>A Copy Of Your Results Will Be Sent To You In An E-mail, <br>
                So Please Ensure This Is A Valid E-Mail Address - Thank You </td>
            </tr>
            <tr bgcolor="#FFEFE8"> 
              <td width="13%" bgcolor="#FEAB6D">Question 1</td>
              <td colspan="2" bgcolor="#FEAB6D"><b>A good leader is a good coach 
                as well. </b></td>
            </tr>
            <tr bgcolor="#FFEFE8"> 
              <td width="13%" rowspan="2">&nbsp;</td>
              <td width="13%" height="2"> 
                <p align="right"><b>TRUE</b></p>
              </td>
              <td width="74%" height="2"> 
                <input type="checkbox" name="qt[1]" value="true">
              </td>
            </tr>
            <tr> 
              <td width="13%" bgcolor="#FFEFE8"> 
                <div align="right"><b>FALSE</b></div>
              </td>
              <td width="74%" bgcolor="#FFEFE8"> 
                <input type="checkbox" name="qf[1]" value="false">
              </td>
            </tr>
            <tr bgcolor="#FFEFE8"> 
              <td width="13%" bgcolor="#FEAB6D">Question 2</td>
              <td colspan="2" bgcolor="#FEAB6D"><b>The person in charge of a unit 
                is always its leader. </b></td>
            </tr>
            <tr bgcolor="#FFEFE8"> 
              <td width="13%" rowspan="2">&nbsp;</td>
              <td width="13%" height="2"> 
                <p align="right"><b>TRUE</b></p>
              </td>
              <td width="74%" height="2"> 
                <input type="checkbox" name="qt[2]" value="true">
              </td>
            </tr>
            <tr> 
              <td width="13%" bgcolor="#FFEFE8"> 
                <div align="right"><b>FALSE</b></div>
              </td>
              <td width="74%" bgcolor="#FFEFE8"> 
                <input type="checkbox" name="qf[2]" value="false">
              </td>
            </tr>

// etc.etc.etc. for 12 questions

code to process form and give feedback

// count up the correct number of right answers
$answers = array( 
        1 => 'false', 
        2 => 'false', 
        3 => 'false',
        4 => 'false',
        5 => 'false',
		6 => 'false',
		7 => 'false', 
		8 => 'false',	
		9 => 'false',
		10 => 'false',
		11 => 'false',
		12 => 'false'
        ); 

	$i = 0; 
    foreach ($answers as $key => $value) 
    { 
        if (!isset($_POST['Submit'][$key])) 
        { 
            if ($value == $_POST['qf'][$key]) { $i++;} 
        } 
    } 
    echo '<br>You got ' . $i . ' out of ' . count($answers) . ' correct.';  


IF (isset($_POST['qt[1]']))
{echo 'Question 1
The right answer was False.
A good leader need not be a good coach as well. <br>
Let\'s be clear about what leadership is fundamentally. <br>Leadership is basically about showing others the direction 
to follow, either by getting somewhere first and setting an example or by indicating the direction. <br>Coaching is a nice 
skill to have, but leaders don\'t have to have it and those who do aren\'t necessarily good leaders. Coaching is mainly 
used for developing people, not for influencing them to change direction.';}
ELSE
{echo 'Question 1 - You got this correct.  A good leader need not be a good coach as well.';}

echo '<p></p><p></p>';
IF (isset($_POST['qt[2]']))
{echo 'Question 2
The right answer was False.
The person in charge of a unit does not have to be its leader. <br>Determining direction is increasingly a knowledge 
based skill. In any group, different people will have different knowledge. Any one of them can take the lead 
on a topic on which they are the expert. Leadership is no longer a monopoly of the one person in charge.';}
ELSE
{echo 'Question 2 - You got this correct.  The person in charge of a unit does not also have to be its leader.';}

 // etc.etc.etc. for 12 questions

the code runs OK (no errors) but isn't counting correctly so I do not get the correct number of 'right answers' back.
also the code where I try to output the response for each question just isn't happening, it just outputs the else statment.