don't use variable

diff --git a/php/plc_api.php b/php/plc_api.php
index 232aff2..cacce90 100644 (file)
--- a/php/plc_api.php
+++ b/php/plc_api.php
@@ -104,9 +104,7 @@ class PLCAPI
       return NULL;
     } else {
       $result = $this->internal_call ($method, $args, 3);
-      if ($result == NULL)
-          $result = "NULL";
-      $memcache->set($key, $result, false, 500);
+      $memcache->set($key, $result == NULL ? "NULL" : $result, false, 600);
       return $result;
     }
   }