I'm trying to create a custom made class that will track the hits, unique visitors, IPs of visitors, referrers, and the landing page. I'm mostly utilizing the $_SERVER global however in the last two hours I've gotten 112 hits and 41 unique visitors. This part is correct, however, I see that some people don't have a referrer and a their landing page is nested deep or a blog article. You can check my statistics below:
I'm wondering how people can land on a blog article or service page without having a referrer. There's no way they can have it bookmarked so what's the other reason?
The client is not required to send the referrer header, so there's never any guarantee you'll receive one regardless of the situation. (Browser privacy settings, using proxy hosts, automated scripts using cURL, etc. might be just a few reasons.)
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