How get 1 question and 4 answers from this script? - php

Question

I am creating a webGL game on Unity but want to get my php correct first.
I have 2 tables questions and answers. Each question has 4 potential answers and need to pull these from my db.
The answer table matches with the question table through questionId.
Questions:
Should I better use a table join or should I separate them?
Should I simply have a select statement just for the question table then a
join table for answers and submit separately?
Should I have created
the answer table with 4 columns for different answers?
Current code:
<?php
$query = ("select questiontable.questionId, questiontable.question, answertable.answerId,answertable.answer, answertable.questionId, questiontable.scoreValue
FROM questiontable
inner join answertable on questiontable.questionId=answertable.questionId ORDER BY RAND () LIMIT 1 ");
$result =mysqli_query($conn, $query) or die(mysqli_error($conn));
while ($row = mysqli_fetch_assoc($result)){
$row_cnt = mysqli_num_rows($result);
echo $row_cnt;
echo $row ['question'];
echo $row ['answer'] ;
echo $row ['answer'] ;
echo $row ['answer'];
echo $row ['answer'];
}
?>
Here are my tables:
CREATE TABLE `braingain`.`questionTable`
( `questionId` INT NOT NULL AUTO_INCREMENT , `question` VARCHAR(600) NOT NULL , `scoreValue` INT NOT NULL , `subject` VARCHAR(50) NOT NULL , PRIMARY KEY (`questionId`));
CREATE TABLE `braingain`.`answerTable`
( `answerId` INT NOT NULL , `answer` VARCHAR(600) NOT NULL , 'questionId', isCorrect;
The query should pull questions and 4 associated answers into an array.
Desired result
The created array should look like this:
| question | answerA | answerB | answerC | answerD |
| WHICH IS THE CORRECT SPELLING? | APPLE | APEL | APPUL | APPAL |

Answer 1

Run two nested queries,
$output = array();
$answer_array = array('answerA','answerB','answerC','answerD');
$query = ("select * from questiontable ORDER BY RAND () LIMIT 1 ");
$result =mysqli_query($conn, $query) or die(mysqli_error($conn));
while ($row = mysqli_fetch_assoc($result)){
$row_cnt = mysqli_num_rows($result);
$output['question']=$row['question'];
$query2 = ("select * from answerTable where questionId = ". $row ['questionId'] order by answerId);
$result2 =mysqli_query($conn, $query2) or die(mysqli_error($conn));
$i=0;
while ($row2 = mysqli_fetch_assoc($result2)){
$output[answer_array[$i]]=$row2['answer'];
$i++;
}
}
print_r($output);
?>

Answer 2

Please have a look at indentation, makes code much more plesant :)
<?php
$query = ("
SELECT
questiontable.questionId,
questiontable.question,
answertable.answerId,
answertable.answer,
answertable.questionId,
questiontable.scoreValue
FROM
questiontable
INNER JOIN
answertable on questiontable.questionId = answertable.questionId
ORDER BY RAND()
LIMIT 1
");
$result = mysqli_query($conn, $query) or die(mysqli_error($conn));
$data = [];
$data[] = null;
$keys = [
'question',
'answerA',
'answerB',
'answerC',
'answerD',
];
$return = [];
while ($row = mysqli_fetch_assoc($result)){
if ($data[0] !== $row['question']) {
$data = [];
$data[] = $row['question'];
}
$data[] = $row['answer'];
if (count($data) === 5) {
$dataAssociative = array_combine($keys, $data);
$return[] = $dataAssociative;
}
}
var_dump($return);
?>

Answer 3

ok, so i have everything working with my php etc. i have it echoing the result as i want heres the code...
<?php
session_start();
include 'dbconnect.php';
$output = array();
$answer_array = array('answerA','answerB','answerC','answerD'); //loads answers into array
$query = ("select * from questiontable ORDER BY RAND () LIMIT 1 ");//sql query to get questions
$result =mysqli_query($conn, $query) or die(mysqli_error($conn));
while ($row = mysqli_fetch_assoc($result)){
$row_cnt = mysqli_num_rows($result);
$output['question']=$row['question'];
$query2 = ("select * from answerTable where questionId = '". ($row ['questionId'])."' order by rand()");//sql query to get answers for questions by questionId
$result2 =mysqli_query($conn, $query2) or die(mysqli_error($conn));
$i=0;
$question=$row ['question'];
while ($row2 = mysqli_fetch_assoc($result2)){
$output[$answer_array[$i]]=$row2['answer'];
$i++;
$_POST = $output;
}
}
echo "</br> ";
echo $_POST ['question'];
echo "</br> ";
echo $_POST['answerA'];
echo "</br>";
echo $_POST['answerB'];
echo "</br>";
echo $_POST['answerC'];
echo "</br> ";
echo $_POST['answerD'];
?>
now i need to store the results in unity so i can assign them to buttons etc.
i have it pulling the details but unsure how to assign for example $_POST['answerA]; to a variable in c#.
this is my c# code...
public class qNaDisplay : MonoBehaviour {
public Text questionDisplayText, answerAText, answerBText, answerCText, answerDText;
public Text questMessage, answerMessage;
private string question, a, b, c, d;
// Use this for initialization
void Start ()
{
WWW questionURL = new WWW("http://localhost:8080/Project/PHP/questionRequest.php");
question = questionDisplayText.text;
a = answerAText.text;
b = answerBText.text;
c = answerCText.text;
d = answerDText.text;
StartCoroutine(qNaget(questionURL));
}
// Update is called once per frame
void Update () {
}
private IEnumerator qNaget (WWW questionURL)
{
yield return questionURL;
Debug.Log(questionURL.text);
if (questionURL.error != null)
{
print("There was an error getting the question " + questionURL.error);
}
else
{
Debug.Log (questionURL.text); // this is a GUIText that will display the scores in game.
}
}
}