Merge branch 'master' of https://git.cse.iitb.ac.in/ayushjangir/sfcode

merge

backend/dir_tree.php

@@ -28,11 +28,16 @@ function dirToArray($dir)
            $result["dirs"][$value] = dirToArray($dir . DIRECTORY_SEPARATOR . $value);
         }
         else
+        {
+            $ext = pathinfo($value, PATHINFO_EXTENSION);
+      
+            if((strcmp($ext, "java") == 0) || (strcmp($ext, "cpp") == 0) || (strcmp($ext, "py") == 0))
             {
                array_push($result["files"], $value);
             }
         }
      }
+  }
  
   return $result;
 }