add cellphone to friends code log

plugins/Common.php

@@ -17,10 +17,10 @@ Class Common {
         $logTime = date('Y-m-d H:i:s');
         $logDir = __DIR__ . '/../runtime/friendscode/';
         $logFilename = substr($cellphone, -6) . '.log';
-        $logOk = @error_log("{$logTime} created\n", 3, "{$logDir}{$logFilename}");
+        $logOk = @error_log("{$logTime} created by {$cellphone}\n", 3, "{$logDir}{$logFilename}");
         if (!$logOk) {      //try to mkdir
             @mkdir($logDir, 0700, true);
-            @error_log("{$logTime} created\n", 3, "{$logDir}{$logFilename}");
+            @error_log("{$logTime} created by {$cellphone}\n", 3, "{$logDir}{$logFilename}");
         }
     }