[SOLVED] simple random function

[noon]

I need a function that accepts 1 parameter, $max.  The function will return an array of numbers from 1 to $max (inclusive) in random order, with no repeats.  Ex: echo rand_group(4); // 3,1,2,4

 

The only approach I can think of right now is generating the random, checking if its already in my array, add if not, generate again if it is. This brute force is quite inefficient I am sure. Wondering if anyone can help me write a better piece of code. For considerations, let's say the max number would never go above 10.

[kenrbnsn]

Look at the range() and the shuffle() functions.

 

<?php
function rand_group($x) {
   $ary = range(1,$x);
   shuffle($ary);
   return($ary);
}

echo implode(', ',rand_group(4));
?>

 

Ken