note 77065 deleted from function.rand by felipe

Note Submitter: alishahnovin at hotmail dot com 

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Quick function that returns an array of unequal random numbers. Works well if you need to assign random values, but want them to all be unique.

<?php
function randiff($min, $max, $num) {
	if ($min<$max && $max-$min+1 >= $num && $num>0) {
		$random_nums = array();
		$i=0;
		while($i<$num) {
			$rand_num = rand($min, $max);
			if (!in_array($rand_num, $random_nums)) {
				$random_nums[] = $rand_num;
				$i++;
			}
		}
		return $random_nums;
	} else {
		return false;
	}
}
?>

So rather than:

<?php
$var1 = rand(0,10);
$var2 = rand(0,10);
?>

Which could potentially give you two of the same values, you can use:

<?php
$nums = randiff(0,10,2);
$var1 = $nums[0];
$var2 = $nums[1];
?>