My page is located here
As you can see, it doesn't look like it's working properly. This becomes very apparent if you try to open it in an older browser (this is what initially set me off).
I checked the interpreted source code from chrome and it shows me the following:
<html>
<head>
<style type="text/css"></style>
</head>
<body>
<title>Internet adgang - Hurtig opsætning - Ansatte</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
Etc..
Something seems to be closing my head tag which is causing all SORTS of errors:
W3 validator
I have absolutely no idea what is causing this.
You can see my source code here (I've scrambled the PHP):
The code above does not contain my body code, as I am fairly sure that has nothing to do with the head tag closing all of a sudden.
Here is some source of a page that works just fine:
I am completely baffled by this and I have no idea what to do nor what is causing it.
Any ideas?
Solution
With the help of Buttc4k3 and vogomatix I finally found the solution. As buttc4k3 said, there was an illegal "zero-width no-space" character hidden in the file which didn't show in my sublime text editor. It would only show if you opened the file in Notepad++. I could not understand why this character would appear in google chrome, and not in my source, but after googling it, I found that a file saved in UTF-8 WITH BOM (Byte Order Marking) would save the BOM as a zero-width no-space character! This was where vogomatix saved me and told me that my file was saved with BOM and after recoding it without BOM it works fine.
So - if you have the same problem as me - save your file WITHOUT BOM ENCODING (this can be done in notepad++).