diff --git a/qrcode/qrencode.php b/qrcode/qrencode.php
index fc909fa..e790e64 100644
--- a/qrcode/qrencode.php
+++ b/qrcode/qrencode.php
@@ -127,26 +127,25 @@ public function init(array $spec)
         }
         
         //----------------------------------------------------------------------
-        public function getCode()
+         public function getCode()
         {
-            $ret;
-
+            $ret = NULL;
             if($this->count < $this->dataLength) {
-                $row = $this->count % $this->blocks;
-                $col = $this->count / $this->blocks;
+                $row = (int)  $this->count % $this->blocks;
+                $col = intdiv($this->count, $this->blocks);
                 if($col >= $this->rsblocks[0]->dataLength) {
                     $row += $this->b1;
                 }
                 $ret = $this->rsblocks[$row]->data[$col];
             } else if($this->count < $this->dataLength + $this->eccLength) {
-                $row = ($this->count - $this->dataLength) % $this->blocks;
-                $col = ($this->count - $this->dataLength) / $this->blocks;
+                $row = (int) (($this->count - $this->dataLength) % $this->blocks);
+                $col = (int) (($this->count - $this->dataLength) / $this->blocks);
                 $ret = $this->rsblocks[$row]->ecc[$col];
             } else {
                 return 0;
             }
             $this->count++;
-            
+
             return $ret;
         }
     }