não intendi vc, mas usei o seguinte codigo <?
// array with link entries in the form url|description
$linkarray = array(
"1|link1",
"2|link2",
"3|link3",
"4|link4",
"5|link5",
);
// seed the random number generator
srand((double)microtime()*1000000);
// get a random entry
$randval = rand(0,count($linkarray)-1);
// explode random entry into an array
$entry = explode("|",$linkarray[$randval]);
// print entry
print (" $entry[1] ");
?>