Question

I’m just trying to write a function that can switch background color.

Each time it’s run, it should return the other color, but it’s not working

function bgcolour_switch(){
    if(!isset($p)){
        global $p;
        $p = "#C0C0C0";
        return $p;
    }else{
        if($p == "#C0C0C0"){
            $p = "#FFFFFF";
            return $p;
        }elseif($p == "#FFFFFF"){
            $p = "#C0C0C0";
            return $p;
        }
    }
}

I keep getting the same color returned (#C0C0C0)

Answer 1

Well, $p is never initially set in the scope of your function, so the if statement always evaluates to true.

Try moving the global $p; line to the beginning of the function, before the if statement.