Randomisation

markyp · #1 20-Feb-2007, 11:00

hi am doing my code now for a multipul choice testing system and am unsure how I can randomise the code in order for the questions to come out in various orders? Anone have any comments or suggestions

Blake · #2 28-Feb-2007, 21:59

Write a function that will randomly swap two questions, and call it about 100 times.

markyp · #3 05-Mar-2007, 08:34

i have 40 questions would i need to but these in a loop liek a do while loop?

Blake · #4 05-Mar-2007, 12:04

Something like this:

PHP Code:


<html>
<head>
<title>random shuffle</title>
</head>
<body>

<?php

$numQuestions = 10;

$questions = Array(numQuestions);

$questions[0] = "Question 0";
$questions[1] = "Question 1";
$questions[2] = "Question 2";
$questions[3] = "Question 3";
$questions[4] = "Question 4";
$questions[5] = "Question 5";
$questions[6] = "Question 6";
$questions[7] = "Question 7";
$questions[8] = "Question 8";
$questions[9] = "Question 9";

srand(time());

for ($i=0; $i<100; $i++)
{
    $rand1 = rand()%$numQuestions;
    $rand2 = rand()%$numQuestions;

    $temp = $questions[$rand1];
    $questions[$rand1] = $questions[$rand2];
    $questions[$rand2] = $temp;
}

for ($i=0; $i<$numQuestions; $i++)
{
    echo $i . ".<br>" . $questions[$i] . "<br><br>";
}

?>

</body>
</html>

Here it is working:

http://www.blake-foster.com/demo/shuffle.php

markyp · #5 05-Mar-2007, 13:47

Quality, thanks a lot for the help looks class

much appreciated

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