Timestamp Convert

Can anyone tell me the problems with this?


public function timestampConvert($timestamp){
$difference = time() - $timestamp;
if($difference < 24) {
return "Today";
}else{
$difference = round($difference / 24);
if($difference < 1) {
return "Yesterday";
}
}
}

The timestamp is in seconds... so your line $difference = time() - $timestamp;
if($difference < 24) { I am thinking the 24 means hours? If so that should actually be if($difference < (24*60*60))
As goes with the rest of your script.