How to compare array values to check correct answer - php

Question

I am working on a quiz app, so the users have MCQ's and on submitting the quiz I need to show the result.
Here is the answers table in the mysql db. Similarly, There is questions table which has the id and question columns, containing the question id and question respectively.
So I am querying the db from the model like this, this returns me an associative array:
$testQuery = $this->db->query("SELECT quiz_id, correct_option FROM answers");
if ($testQuery->num_rows() > 0) {
return $testQuery->result_array();
}
Here, I'm printing the array in my controller, Which looks like this on doing the foreach:
$allCorrectOptions = $this->DataModel->readCorrectOptions();
$asize = sizeof($allCorrectOptions);
for($i = 0; $i < $asize; $i++){
echo "<pre>";
var_dump($allCorrectOptions[$i]);
echo "</pre>";
}
The Result of the above snippet:
array(2) {
["quiz_id"]=>
string(2) "13"
["correct_option"]=>
string(13) "Maruti suzuki"
}
array(2) {
["quiz_id"]=>
string(2) "14"
["correct_option"]=>
string(6) "Kotlin"
}
array(2) {
["quiz_id"]=>
string(2) "15"
["correct_option"]=>
string(4) "BOSS"
}
In the view there are radio input tags and the name attribute contains an array (allques) with quiz_id as key so when the user submits the test, I'm doing this to get the quiz_ids and selected values.
$nums = $this->input->post('allques');
foreach ($nums as $key => $value) {
echo "<br>" . $key . "==" . $value;
}
The Result of the above snippet:
13==Maruti suzuki
14==MongoDB
15==Ubuntu Linux
So what I am thinking of doing is, getting the array result of the db query similar to the the snippet result above, so that I can compare the quiz_id and correct_option's with the user submitted values with the help of a loop like: if quiz_id.this == submitted quiz_id && correct_option.this == submitted value then correct_answers++. After that showing the result
If this approach of checking is not effective, then is there any other way to do this properly.

Answer 1

I have figured it out, it can be done like this.
foreach ($allCorrectOptions as $key) {
echo $key['quiz_id'] . "==" . $key['correct_option'] . "<br>";
}