Purely cosmetic (used when trying to leave no trace in
output HTML that PHP was ever there..) - if an embedded
PHP command is followed by a LF (in the PHP/HTML source),
then shouldn't it be present in the output HTML stream?

For example, if you have something like:

      ...
   </DIV><?PHP
      ...
   ?>

   <TABLE>
      ...

Wouldn't you expect the output (assuming the PHP code output
nothing itself) to be like so:

      ...
   </DIV>

   <TABLE>
      ...

Yet when viewed in Netscape 4.04 (Linux, output coming from
a Solaris server), the output is actually:

      ...
   </DIV>
   <TABLE>
      ...

The blank line in the middle is missing, as though the
trailing LF had been eaten.

For the most part this is purely cosmetic as I said - unless
someone is trying to match a certain output format (to be
parsed by an automated tool) in which case they'll have to
start inserting additional LF's into the output stream just
to compensate (which then becomes a guessing game).