How to add randomize row values in php without repeatition [duplicate] - php

Question

This question already has answers here:
Accessing random rows from database without repetition
(2 answers)
Closed 4 years ago.
from the past few days i have had this problem with a quiz scenario in created as part of my project. i wanted random questions to be asked but when i use the rand() function , the questions are being repeated. also i figured out that since its being done on the same page and every time the page refreshes, the random number is again selected thereby leading to this flaw! so i considered storing the value of the last random que_id in a session and generating a query like so:
enter code here <?php session_start();$jsqla=mysql_query("select que_id from mst_que");$jfeta=mysql_fetch_assoc($jsqla);session_start();$id=array($jfeta['id$_SESSION['id'][] = $id;$rs=mysql_query("SELECT * FROM `mst_que` WHERE que_id NOTIN ('id') ORDER BY RAND() ")
Please help me in this. I just want to create a session array where i want to store the previously generated random number and use it in query so that it is not repeated again. please

Answer 1

Store it in a variable and unset it from the array of questions:
function get_question($questions)
{
$question = rand($questions);
$questionKey = array_search($question, $questions);
unset($questions[$questionKey]);
return $question;
}

Answer 2

Try creating an array and then assign it to any session variable, for example:
$quizQuestions[] = $questionId;
$_SESSION['question'] = $quizQuestions;
In case you want to update the value, simply fetch it and assign new value and update it in the same variable again:
$quizQuestions = $_SESSION['question'];
$quizQuestions[] = $questionId;
$_SESSION['question'] = $quizQuestions;
Make sure that you have a session started first, add the following code to the very start of this script:
if(!isset($_SESSION)) {
session_start();
}