Anyone can help us??

can't figure out what's causing it. here is the error:

Warning: Invalid argument supplied for foreach() in /home/Websites/auctionlot/includes/functions/indvshipzones.php on line 58

Here is the code around that line:

}

function Display($product_id) {
$return = "";
$nZones = count(GetAllZones());
$i = 1;
foreach(GetAllZones() as $key=>$value) {
$finLigne = "";
if ($i==$nZones) { // Cherche la fin de tableau
$modulo = $i%3; // Nombre de cellules vides restantes
for ($x=0; $x