How to get user agent in PHP

Question

I'm using this JS code to know what browser is user using for.

<script>   document.write(navigator.appName); </script> 

And I want to get this navigator.appName to php code to use it like this:

if ($appName == "Internet Explorer") {   // blabla } 

How can I do it?

Answer 1

Use the native PHP $_SERVER['HTTP_USER_AGENT'] variable instead.