Format PHP code

imagelightnessat.func.php

@@ -9,30 +9,28 @@
  *        x, y        The coordinates of the pixel to work on
  *
  * by Jed Smith <?php $u = "jed"; $d = "bz"; printf("<%s@%s.%s>", $u, $u, $d) ?>
- */ 
-function imagelightnessat($img, $x, $y)
-{
-    if(!is_resource($img))
-    {
-        trigger_error("imagelightnessat(): supplied argument is not a valid "
-            . "Image resource", E_USER_WARNING);
+ */
+function imagelightnessat($img, $x, $y) {
+    if (!is_resource($img)) {
+        trigger_error('imagelightnessat(): supplied argument is not a valid '
+            . 'Image resource', E_USER_WARNING);
+
         return 0.0;
     }
     $c = @imagecolorat($img, $x, $y);
-    if($c === false) return false;
-    if(imageistruecolor($img))
-    {
+    if ($c === false) {
+        return false;
+    }
+    if (imageistruecolor($img)) {
         $red = ($c >> 16) & 0xFF;
         $green = ($c >> 8) & 0xFF;
         $blue = $c & 0xFF;
-    }
-    else
-    {
+    } else {
         $i = imagecolorsforindex($img, $c);
         $red = $i['red'];
         $green = $i['green'];
         $blue = $i['blue'];
-    }    
+    }
     $m = min($red, $green, $blue);
     $n = max($red, $green, $blue);
     /* Because RGB isn't normalized in GD, we divide by 510 here.
@@ -40,8 +38,7 @@ function imagelightnessat($img, $x, $y)
      * But that's assuming red, green, and blue are 0 through 1 inclusive.
      * Red, green, and blue are actually 0-255 (255 + 255 = 510).
      */
-    $lightness = (double)(($m + $n) / 510.0);
-    return($lightness);
-}
+    $lightness = (float) (($m + $n) / 510.0);
 
-?>
+    return $lightness;
+}