<?php
$array = array (
"1" => "http://www.odkazcislojedna.sk",
"2" => "http://www.odkazcislodva.sk",
"3" => "http://www.odkazcislotri.sk"
);
$baner = rand(1, 3); //nahodne cislo od jedna do tri
$typ = ".jpg"; //pripona suboru
?>
<a href="<?php echo $array[$baner]?>">
<img src="<?php echo $baner.$typ"; ?>" />
</a>
Neskúšal som to, ale malo by to fungovať.
