If you try and use $var in an operation ( i.e. .= < == etc) and you get an error saying "Undefined variable" then isset($var) = FALSE
LJ "Erik Price" <[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Hm. I hope I'm not opening an old wound: > > Curious about the proper way to test for the existence of a variable, I > decided to read up on isset() at php.net's function manual pages. It > seems at first to be a way to test whether or not a variable has been > set. > > But reading the annotations below the documentation is mind boggling. > Back and forth, it seems to go -- and then to find out that one method > is to be used to test for POSTed variables, and another to be used for > GETted variables (for $_POST, use "$_POST['var'] !='' ", and for $_GET, > use "!isset($_GET['var'])"). > > Pretty confusing. Can anyone shed some light on whether or not there is > a final definite way to do this? I've used (!($_POST['var'])) with no > problems in the past, but does good coding style suggest that I use > (!isset($_POST['var'])) now? > > > Erik > > > > > > ---- > > Erik Price > Web Developer Temp > Media Lab, H.H. Brown > [EMAIL PROTECTED] > -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
