From f9ccb251e5bac02f1a5056588cd4a686daa60d44 Mon Sep 17 00:00:00 2001
From: Stefan van Gastel <stefanvangastel@gmail.com>
Date: Sat, 26 May 2018 15:20:19 +0200
Subject: [PATCH] Fixed duration calculation

Since the timer_stop() function returns a string a warning was thrown due to invalid number format.
---
 src/Server_Instrumentation.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Server_Instrumentation.php b/src/Server_Instrumentation.php
index 7ef424d..ae16461 100644
--- a/src/Server_Instrumentation.php
+++ b/src/Server_Instrumentation.php
@@ -35,7 +35,7 @@ function endRequest()
             $url = $_SERVER["HTTP_HOST"].$_SERVER["REQUEST_URI"];
             $requestName = Common::getPageTitle();
             $startTime = $_SERVER["REQUEST_TIME"];
-            $duration = timer_stop(0, 3) * 1000;
+            $duration = floatval(timer_stop(0, 3)) * 1000;
             $this->_telemetryClient->trackRequest($requestName, $url, $startTime, $duration, http_response_code(), !is_404());
 
             // Flush all telemetry items