NULL ! "" are all the same

[johnsmith153]

The below of course doesn't work as NULL and blank are the same.

 

How could I get somethig like this to work?

 

function getValue($val) {

switch ($val) {
    case NULL:
        echo "";
        break;
    case "";
        echo $_GET['value'];
        break;
    default:
        echo $val;
        break;
}

}

//this uses current value in $_GET['value'] (don't provide a new one)
getValue();

//this uses the new value provided
getValue("hello"); 

//this clears and displays nothing
getValue(NULL);

[johnsmith153]

Ensure you use this

 

//this uses current value in $_GET['value'] (don't provide a new one)
getValue("");

 

...and use is_null instead of ==NULL