g and the mode modifiers "l", "d", "-" and "t" were added
in PHP 4.3.0. In PHP versions before PHP 4.3.0 you must use semaphores
to guard against simultaneous database access for any database handler
with the exception of GDBM. See System V semaphore suppor
The biggest problem I've had with persistent connections is the problems
that arise when the connection goes down. You have to monitor the
connection status anyways (and reconnect on a failure), so it was
usually easier to just connect every time. I don't know if this is
specific to sybase. You
