Option value selected for loop - php

Question

I am trying to create a selected value of the previous output.
(the user fills in a form , submits, returns to the form) And I want the selected value to be the value the user previously used.
The vraagNummer and answer are given in the url parameter and the dropdown menu of items available in the list are created in a for loop.
Now I got stuck on that part.. How do I create an option selected value if it is created in a for loop?
Usually I would just put in option value = $vraagNummer selected> <?php echo $vraagNummer ?></option but in this case that wouldn't work. I suppose?
Anyone knows how to fix this?
Same with the A/B/C/D. How do I put in the selected value of answer into the value previously selected while still keeping the others as an option.
With kind regards,
if(!empty($_GET['vraagnummer'])){
$vraagNummer = $_GET['vraagnummer'];
if(!empty($_GET['answer'])){
$answer = $_GET['answer'];
}
}
echo $vraagNummer;
echo $answer;
?>
<form id="start" method="post" action="index.php?test=true">
<select name="question">
<?php
for($i= 1; $i < $nRows+1 ; $i++){
?><option value="<?php echo $i ?>">Question <?php echo $i?></option>
<?php
}
?>
</select>
<select name="result">
<option value="A">Answer A</option>
<option value="B">Answer B</option>
<option value="C">Answer C</option>
<option value="D">Answer D</option>
<input type="submit" id="submit" value="Submit" />
</form>

Answer 1

You simply test the $_GET['question'] against the current $i value in the loop using a ternary if
<form id="start" method="post" action="index.php?test=true">
<select name="question">
<?php
for($i= 1; $i < $nRows+1 ; $i++){
$sel = (isset($_GET['question']) && $_GET['question'] == $i) ? 'selected="selected"' : '';
echo '<option ' . $sel . ' value="' . $i .">Question ' . $i . '</option>';
}
?>
</select>
Warning:
Also be careful with the use of empty() when the variables can contain a zero as zero is considered as empty by the empty() function
Actually I would do your other dropdown like this
<select name="result">
foreach (range('A', 'D') as $char) {
$sel = (isset($_GET['result']) && $char == $_GET['result']) ? 'selected="selected"' : '';
echo "<option $sel value='$char'>Answer $char</option>";
}
</select>