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's function manual pages.  It 
seems at first to be a way to test whether or not a variable has been 

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 Price
Web Developer Temp
Media Lab, H.H. Brown

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