I would make those variables in one array <o/
like:
$var=array();
$var[0]="Bob";
$var[1]="Jack";
$var[2]="Borat";
//etc
//then I'd use random to help me out ^^
$randomvar=rand(0,2);
echo $var[$randomvar];
//here is it :P
Or maybe you wanted to show all of them?
$var[0][r]=rand(0,2);
$var[1][r]=rand(0,2);
$var[2][r]=rand(0,2);
then you can use ksort(); to sort your array 😉
If those values are in mysql, then it's much easier again: mysql_query("SELECT * FROM table WHERE a<b ORDER BY RAND()");
Hope this helps o/