Quiz app with multiple possible answers (logical problem)

i dont see anything complicated with this apart from the misspell stuff, but you can just treat the answer with the wrong spelling as incorrect

Suppose you have 4 person as the "correct answer" then you assign a "point" for each one. For example they get 1 point for each "right name" they give, so the maximum is 4 points.

How to determine a name is "right", then? The easy way is to limit the scope: "Please write answer in the following order: First name - Last name".

Or, if you want to allow shuffle, you could do something like this:

correct = " Jane Doe"
input = " Doe Jane "

a = first word of input //Doe
b = 2nd word of input //Jane

reverse = b + " " + a

if (input != correct AND reverse != correct){
	return false
}

The misspell on the other hand, should be treated as incorrect, as i said. If you want to tolerate it, you had to bring in something like a full-text search engine. But what is the point of a "Quiz" if everyone type in the wrong answer and it is treated as right?

I am assuming every question has its answers, so I will get the answers of a specific question.

$answers = Question::find($id)->answers;

Let's say you get the form he student has submitted and you store it, after validation of course, in $student_answers, now you can pass it to this method that will check if the answers match or no calling this method, that will define later

checkIfAnswersMatch($answers, $student_answers);

The method should be something like this

function checkIfAnswersMatch($answers, $student_answers): bool {
    foreach ($student_answers as $student_answer) {
        if(!in_array(standardizeAnswer($student_answer), $answers)){
            return false;
        }
    }

    return true;
}

Note that we have a function called standardizeAnswer this one will help you get the student answer to be as close as the real answer

function standardizeAnswer(string $answer): string {
    // 1. remove all whitespaces
    $answer = preg_replace('/\s+/', '', $answer);
    // 2. all to lowercase
    $answer = strtolower($answer);
    // 3. you can do some regex you define to accept a word if it matches 99% for example (so all the letters expect one?)

    return $answer;
}

Now, when creating your answers with the question, setup a mutator or an observer to transform the answers to lowercase, so now you avoid checking if it's uppercase or not (when the student answer is all lowercase, and the original answer is too all lowercase, that's an easier check for the misspelled uppercases), and you can take it even further by setting simple regex to return true if the word has all the letters or all of them except one letter.

This should be as close as possible, in this kind of quizzes you usually add hints* (from my personal experience playing in different platforms and submitting this kind of answers where you are free to type wherever), so you say, the answers should be 4 letters, or any kind of helpful hints, as you can't really control users minds, you will never get that 100% matching, so guide your users, and what's a quizz if there are not mistakes and all answers are accepted.