Help with retrieving answers from radio buttons - php

Question

$host = 'localhost';
$user = 'root';
$pw = '';
$db = 'pmdb';
mysql_connect($host,$user,$pw);
mysql_select_db($db);
$result = mysql_query("SELECT * FROM Questions WHERE QuizID=1");
$num_rows = mysql_num_rows($result);
while($row = mysql_fetch_assoc($result))
{
$array[] = $row;
}
for($i=0; $i<=($num_rows-1); $i++)
{
$title = $array[$i]['Title'];
$ans1 = $array[$i]['Answer1'];
$ans2 = $array[$i]['Answer2'];
$ans3 = $array[$i]['Answer3'];
$ans4 = $array[$i]['Answer4'];
echo $title.'<br>';
echo '<form method="post">';
echo '<input type="radio" name="ans'.$i.'">'.$ans1.'<br>';
echo '<input type="radio" name="ans'.$i.'">'.$ans2.'<br>';
echo '<input type="radio" name="ans'.$i.'">'.$ans3.'<br>';
echo '<input type="radio" name="ans'.$i.'">'.$ans4.'<br>';
}
echo '<input type="submit" value="submit" id="submit">';
echo '</form>';
I manage to display the question followed by the corresponding choices and at the bottom a submit button.
How would I, on click of the submit button, get the values that the user have chosen for each question that was looped out from the database? ans1, ans2, etc.
This is necessary to compare their answer to the answer key and compute their score.
.help please! Thank you very much and More power!

Answer 1

Assign a value to each of the radio inputs, the updated script could be:
$host = 'localhost';
$user = 'root';
$pw = '';
$db = 'pmdb';
mysql_connect($host,$user,$pw);
mysql_select_db($db);
$result = mysql_query("SELECT * FROM Questions WHERE QuizID=1");
$num_rows = mysql_num_rows($result);
while($row = mysql_fetch_assoc($result))
{
$array[] = $row;
}
//Start the form
echo "<form method=\"post\" action=\"path/to/receiving.php\">\n";
for($i=0; $i<=($num_rows-1); $i++)
{
//Render a question + the answer choices
echo $array[$i]['Title']."<br />\n";
for ($j=1;$j<=4;$j++) {
echo "<input type=\"radio\" name=\"ans$i\" value=\"$j\">".
$array[$i]['Answer'.$j]."<br />\n";
}
}
//End the form
echo "<input type=\"submit\" value=\"submit\" id=\"submit\">\n</form>";
Now to read the values of the answers from within PHP:
echo $_POST["ans1"];
//The answer given for question 1, will be between
// 1-4 or null (if they didn't answer