public object PeekValue(int i)
{
object result;
if (ArgCount >= i)
{
// peeks the value:
result = PeekValueUnchecked(i);
// stores the value back to the stack so that user args functions can work with it:
Items[Top - i] = result;
}
else
{
result = null;
// warning (can invoke user code => we have to save and restore callstate):
CallState call_state = SaveCallState();
PhpException.MissingArgument(i, CalleeName);
RestoreCallState(call_state);
}
return(result);
}