I've written a couple of classes where I store objects in an array.
The most recent, I store player information on a Half-Life server in an array in a object, so I can do something like this...
for($loop = 0; $loop < sizeof($obj->players); $loop++) {
print $obj->players[$loop]->name."<br>";
}
... or something like this...
foreach($obj->players as $player) {
print "$player->name<br>";
}