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

This isn't really hard to do: isset is the method you need.

if (!isset($_GET['category'])) {
    // category isn't set
} elseif ($_GET['category'] === '0') {
    // category is set to 0
} else {
    // category is set to something other than 0
}

Note that I have compared for exact equality to the string '0', because GET and POST variables are always strings (or occasionally arrays) and never numbers when PHP first receives them.