if (count($parts) == 0 || count($parts) > 3) {
print "Invalid input\n";
break;
}
$command = strtoupper($parts[0]);
switch ($command) {
case "END":
$loopCondition = false;
break;
case "SET":
if (count($parts) != 3) {
print "Invalid input\n";
$loopCondition = false;
break;
}
$simpleDB->setValue($parts[1], $parts[2]);
break;
case "UNSET":
if (count($parts) != 2) {
print "Invalid input\n";
$loopCondition = false;
break;
}
$simpleDB->unsetKey($parts[1]);
break;
case "GET":
if (count($parts) != 2) {
print "Invalid input\n";
$loopCondition = false;
break;
}