diff --git a/fpdi.php b/fpdi.php
index 48223a3..d85842c 100644
--- a/fpdi.php
+++ b/fpdi.php
@@ -571,7 +571,7 @@ class FPDI extends FPDF_TPL
 
                 reset ($value[1]);
 
-                while (list($k, $v) = each($value[1])) {
+                foreach ($value[1] as $k => $v) {
                     $this->_straightOut($k . ' ');
                     $this->_writeValue($v);
                 }
diff --git a/fpdi_pdf_parser.php b/fpdi_pdf_parser.php
index a9622b0..7add424 100644
--- a/fpdi_pdf_parser.php
+++ b/fpdi_pdf_parser.php
@@ -218,16 +218,30 @@ class fpdi_pdf_parser extends pdf_parser
             
         if (!is_null($box) && $box[0] == pdf_parser::TYPE_ARRAY) {
             $b = $box[1];
-            return array(
-                'x' => $b[0][1] / $k,
-                'y' => $b[1][1] / $k,
-                'w' => abs($b[0][1] - $b[2][1]) / $k,
-                'h' => abs($b[1][1] - $b[3][1]) / $k,
-                'llx' => min($b[0][1], $b[2][1]) / $k,
-                'lly' => min($b[1][1], $b[3][1]) / $k,
-                'urx' => max($b[0][1], $b[2][1]) / $k,
-                'ury' => max($b[1][1], $b[3][1]) / $k,
-            );
+            if($k == NULL){
+                return array(
+                    'x' => NAN,
+                    'y' => NAN,
+                    'w' => NAN,
+                    'h' => NAN,
+                    'llx' => NAN,
+                    'lly' => NAN,
+                    'urx' => NAN,
+                    'ury' => NAN,
+                );
+            }else{
+                return array(
+                    'x' => $b[0][1] / $k,
+                    'y' => $b[1][1] / $k,
+                    'w' => abs($b[0][1] - $b[2][1]) / $k,
+                    'h' => abs($b[1][1] - $b[3][1]) / $k,
+                    'llx' => min($b[0][1], $b[2][1]) / $k,
+                    'lly' => min($b[1][1], $b[3][1]) / $k,
+                    'urx' => max($b[0][1], $b[2][1]) / $k,
+                    'ury' => max($b[1][1], $b[3][1]) / $k,
+                );
+            }
+
         } else if (!isset($page[1][1]['/Parent'])) {
             return false;
         } else {