fix typo

diff --git a/php/plc_api.php b/php/plc_api.php
index 61fb298..fed4759 100644 (file)
--- a/php/plc_api.php
+++ b/php/plc_api.php
@@ -84,7 +84,7 @@ class PLCAPI
     // Key is the md5sum of method + (arguments list - session variables)
     $arguments = $args;
     unset($arguments[0]);
-    return md5($method . serialize(arguments));
+    return md5($method . serialize($arguments));
   }
 
   function lookup($method, $args = NULL)