Combine 2 arrays by matching the same foreign key

Question

I have 2 table, that is a question_table and answer_table the structure is like this :

And I have a JSON array that I got from question_table and answer_table using php

Answer 1

Can you try following code:

$sql = "select q.id, q.question, a.aswer from question_table q inner join answer_table a ON q.id = a.id_question”;
$resultPertanyaan = mysqli_query($con, $sql);

while($rowQuery= mysqli_fetch_array($resultPertanyaan)){
   $array_result[]= 
array('id'=>$rowQuery['id’],’question’=>$rowQuery['question'], 'answer' => $rowQuery['aswer']);
}