在提交之前修改$ _POST变量

Question

I'm making a quiz generator, and I have an HTML form with radio buttons for multiple choice answers. Right now, when I submit my form, the contents of the $_POST variable looks like this when I submit it:

Array ( [a1] => Bob [a2] => Bobby )

(Bob and Bobby are the radio button choices I picked)

I'm generating this form using a PHP function, which returns an array of answers in addition to echoing the HTML form. Is there a way to modify the $_POST variable to have an 'answer' field (for checking my answers), like this:

 Array( [a1] => Bob [a2] => Bobby [answers] => Array( [0] => Bob [1] => Bilbo ))

The above was one way I thought of to check answer array with $_POST array.

Edit: More info on what I have so far:

• I have a PHP function getTest() that echoes the HTML form, and returns an array with the correct answers.
• getTest() generates each question randomly, and as such the correct answers are random.
• The main problem is that I have two separate PHP files, questions.php and verify.php.
  • questions.php echoes the form using getTest(), and has the array of answers.
  • verify.php only has the contents of $_POST, BUT NOT the array of correct answers.

Is there a better way to check the results of the form submission in general? Thanks!

Answer 1

The best way to do a quiz is to have an answers array and a user input array. Loop through one and compare to the other using the same increment.

You can take all of your post variables and create an array print_r($_POST); Then, loop through this.

$inputArray = //the post data into an array
$answerArray = array('a','b','a');
$numCorrect = 0;
for($a = 0; $a < count($inputArray); $a++)
{
if($inputArray[$a] == $answerArray[$a])
{
$numCorrect++;
}
}