Getting confused with empty, isset, !empty, !isset

Question

I have the following which doesn\'t work properly as $_GET[\'category\'] can also equal 0.

if ( empty( $_GET[\'category\'] ) ){
    // do something
         


        

Answer 1

Try this:

if (!isset($_GET['category'])) { // if variable not specified
}
elseif ($_GET['category'] == 0) { // variable is specified and zero
}
else { // variable is specified and not zero
}