在PHP中获取HTML表单ID

Question

I would like to get the form ID with PHP. This is my HTML code. Each answer per question, has an ID.

<br><br><h3>Vraag 1: Wat is de juiste formule van Arbeid?</h3>

    <input type="radio" name="question-1" id="question-1-A" value="2" />
    <label for="question-1-A">A) Kracht (in Newton) keer Lengte (in meter) </label>

    <input type="radio" name="question-1" id="question-1-B" value="0" />
    <label for="question-1-B">B) Kracht keer Massa</label>

    <input type="radio" name="question-1" id="question-1-C" value="0" />
    <label for="question-1-C">C) Kracht keer valversnelling</label>

    <input type="radio" name="question-1" id="question-1-D" value="0" />
    <label for="question-1-D">D) Geen van deze antwoorden</label>

So in PHP, I receive the values like this, to calculate the score:

$q1=$_POST['question-1'];

But how can I receive the ID and make it so that

if (*QUESTION-1-A* *IS FILLED IN*)
{
     echo "You filled in A"
}

How do I do this?

Answer 1

PHP can only access the values passed using POST/GET so you can't access the input IDs or form IDs. You can however create a hidden element like:

<br><br><h3>Vraag 1: Wat is de juiste formule van Arbeid?</h3>

    <input type="radio" name="question-1[]" id="question-1-A" value="2" />
    <label for="question-1-A">A) Kracht (in Newton) keer Lengte (in meter) 
    </label>

    <input type="radio" name="question-1[]" id="question-1-B" value="0" />
    <input type="hidden" name="question-1_ID[]" value="question-1-B"  />
    <label for="question-1-B">B) Kracht keer Massa</label>

    <input type="radio" name="question-1[]" id="question-1-C" value="0" />
    <input type="hidden" name="question-1_ID[]" value="question-1-C"/>
    <label for="question-1-C">C) Kracht keer valversnelling</label>

    <input type="radio" name="question-1[]" id="question-1-D" value="0" />
    <input type="hidden" name="question-1_ID[]" value="question-1-D" />
    <label for="question-1-D">D) Geen van deze antwoorden</label>

Now when you post the form you can do:

$questions = ["A","B","C","D"];    
foreach($_POST['question-1'] as $index => $response){
    if($response!==''){
        // then there is something in it.
        echo "You filled in Question ".$questions [$index];
    }
}

Hope this helps.