hawkmaster1: Unerklärliche Undefined index: HTTP_HOST

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Hallo zusammen,

auf einem Server im lokalen Intranet läuft ein Xammp (windows Server 2012) Im Php error log finde ich immer wieder unerklärlich Einträge zu Undefined index: HTTP_HOST

In der index.php steht folgender Code:

<?php
	if (!empty($_SERVER['HTTPS']) && ('on' == $_SERVER['HTTPS'])) {
		$uri = 'https://';
	} else {
		$uri = 'http://';
	}
	$uri .= $_SERVER['HTTP_HOST'];
	header('Location: '.$uri.'/ibs/projectdb.php');
	exit;
?>
Something is wrong with the XAMPP installation :-(

Im error log kommen dann diese Einträge vor. Was mich wundert: Es sind immer zwei Einträge am Tag und die Uhrzeit geht immer etwas nach oben. Von zb. 08:39 am 23. Juli bis 08:42 am 28 August. Was kann denn die Ursache sein? $_SERVER['HTTP_HOST'] müsste doch eigentlich immer gesetzt sein, wenn man über Browser die Seite aufruft oder?

Hier die Log Auszüge:

[23-Jul-2016 08:39:59 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[23-Jul-2016 08:39:59 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[24-Jul-2016 08:40:03 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[24-Jul-2016 08:40:03 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[25-Jul-2016 08:40:07 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[25-Jul-2016 08:40:07 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[26-Jul-2016 08:40:11 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[26-Jul-2016 08:40:11 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[27-Jul-2016 08:40:15 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[27-Jul-2016 08:40:15 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[31-Jul-2016 08:40:32 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[31-Jul-2016 08:40:32 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[06-Aug-2016 08:40:57 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[06-Aug-2016 08:40:57 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[07-Aug-2016 08:41:02 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[07-Aug-2016 08:41:02 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[09-Aug-2016 08:41:10 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[09-Aug-2016 08:41:10 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[10-Aug-2016 08:41:14 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[10-Aug-2016 08:41:14 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[11-Aug-2016 08:41:18 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[14-Aug-2016 08:41:30 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[14-Aug-2016 08:41:31 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[15-Aug-2016 08:41:35 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[15-Aug-2016 08:41:35 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[16-Aug-2016 08:41:39 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[16-Aug-2016 08:41:39 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[17-Aug-2016 08:41:48 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[17-Aug-2016 08:41:48 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[19-Aug-2016 08:41:56 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[19-Aug-2016 08:41:56 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[22-Aug-2016 08:42:08 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[22-Aug-2016 08:42:09 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[28-Aug-2016 08:42:33 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

[28-Aug-2016 08:42:33 Europe/Berlin] PHP Notice:  Undefined index: HTTP_HOST in C:\xampp\htdocs\index.php on line 7

viele Grüße

Hawk