PHP ImageMap Class File

<?PHP

// Gaia Sig Mapper
// Regions are Defined By Rect Normally
// Jakobo @ Gaia Online

// Class Definition
// This is responsible for the definition of coordinates

 class imageMap {
     var $locale;
     var $defaultURL;
     var $size;

     function imageMap() {
         // makes locale ready for data
         $this->locale = array();
         $this->size = 0;
     }

     function setDefaultURL($inUrl) {
        $this->defaultURL = $inUrl;
     }

     function addToMap($Region) {
         $this->locale[$this->size] = $Region;
         $this->size++;
     }

     function testMap($inX, $inY) {
         foreach($this->locale as $Region) {
            $Region->goIfInside($inX, $inY);
         }
         // we didn't go anywhere, load the default
         header("Location: " . $this->defaultURL);
     }
 }

 class Region {
     var $type; // type of region
     var $url; // url of region

     function Region() {
     // empty constructor
     }
}

class Rect extends Region {
     var $x1,
     $y1,
     $x2,
     $y2;

     function Rect($inX1, $inY1, $inX2, $inY2, $inUrl) {
         $this->x1 = $inX1;
         $this->y1 = $inY1;
         $this->x2 = $inX2;
         $this->y2 = $inY2;
         $this->url = $inUrl;
         $this->type = "rect";
     }

     function isInside($clickedX = -1, $clickedY = -1) {
         // if X and Y are not set, -1 is used
         // placing it outside of the image map
         if(($clickedX >= $this->x1 && $clickedX <= $this->x2) && ($clickedY >= $this->y1 && $clickedY <= $this->y2) ) {
            return true;
         }
         else {
            return false;
         }
     }

     function goIfInside($clickedX = -1, $clickedY = -1) {
         // goes to object's URL if inside
         if($this->isInside($clickedX, $clickedY)) {
            header("Location: " . $this->url);
            exit;
        }
    }
 }

 ?>