How to match student's answer to actual answer - php

Question

I have a foreach loop below where it displays data for each table row:
foreach ($studentData['questions'] as $questionId => $questionData) {
...
echo '<td width="30%" class="answers">'.htmlspecialchars($questionData['answer']).'</td>' . PHP_EOL;
...
echo '<td width="30%" class="studentanswer">'.htmlspecialchars($questionData['studentanswer']).'</td>' . PHP_EOL;
}
What I want to do is that if an studentanswer matches an answer, then that studentanswer will turn green, if not a match then display incorrect answers in red, and if full studentanswer matches 100% with answer then I want a variable such as $check to display string station fully correct in green else if not 100% match then display string not full correct in red.
So for example the above code could display this:
Answer: B C
Student Answer: B D
The output of the above should display student answer B as green as it matches with answer B but student answer D should be red as there is no D in answer. The variable $check should state in red not fully correct as the student's answer is not fully correct, just partial.
But how can this be achieved?
UPDATE:
It is not changing color of text:
if($questionData['answer'] == $questionData['studentanswer']) {
$style = 'green';
$checked = 'Fully Correct';
} else {
$style = 'red';
$checked = 'Not Correct / Not Fully Correct';
}
echo '<td width="30%" class="answers '.$style.'">'.htmlspecialchars($questionData['answer']).'</td>' . PHP_EOL;
...
echo '<td width="30%" class="studentanswer '.$style.'">'.htmlspecialchars($questionData['studentanswer']).'</td>' . PHP_EOL;
CSS:
.red{
color: red;
}
.green{
color: green;
}

Answer 1

Try this:
$check = true;
foreach ($studentData['questions'] as $questionId => $questionData) {
$studentAnswer = htmlspecialchars($questionData['studentanswer']);
$answer = htmlspecialchars($questionData['answer']);
...
echo '<td width="30%" class="answers">'.htmlspecialchars($questionData['answer']).'</td>' . PHP_EOL;
...
if($answer == $studentAnswer)
{
echo '<td width="30%" class="studentanswer greenAnswer">'.htmlspecialchars($questionData['studentanswer']).'</td>' . PHP_EOL;
}
else
{
echo '<td width="30%" class="studentanswer redAnswer">'.htmlspecialchars($questionData['studentanswer']).'</td>' . PHP_EOL;
$check = false;
}
}
if($check)
{
echo '<p class="greenAnswer">Fully Correct!</p>';
}
else
{
echo '<p class="redAnswer">Not Fully Correct!</p>';
}
In your CSS put the following:
greenAnswer
{
color:green;
}
redAnswer
{
color:red;
}

Answer 2

<?php
if($questionData['answer'] == $questionData['studentanswer'] {
$style = 'color:green';
$checked = 'right';
} else {
$style = 'color:red';
$checked = 'not fully correct';
}
?>
...
<td width="30%" class="answers" style="<?php echo $style; ?>">
<?php echo $checked; ?>

Answer 3

You can use conditions to achieve this.
With php's if() function, you can make sure your script meets certain conditions that you choose before processing a certain piece of code.
So to check if a student's answer matches the teachers answer, inside the loop, you'll add something like:
if( $questionData['studentanswer'] == $questionData['answer'] )
{
// The answer was correct
}
else {
// This is for the answer not being correct
}
This code just shows an example of how to achieve what you are trying to accomplish, of course you'll need to make your own to exactly match your needs.
If you have any other questions or need further assistance feel free to ask.