Hmm, so are we supposed to say "Darn those nasty PHP developers for putting variable interpolation into the language!" or something?
More to the point, your GOOD example may improve performance a little, but you BAD example is nevertheless perfactly valid PHP from a syntax point of view, so it doesn't really address his problem.
From what Yallon has written, I don't see what's wrong, either. The statement:
$message="Name: $Name";
looks like perfectly valid PHP to me. What exactly is the error message, and what do the few lines preceding this look like?