Determine if operating system is Mac

Question

I have been doing a lot of Googling recently to try and find a simple, easy php script that will identify if the user is on a Mac or not.

I want to use this to tell users if the keyboard shortcut I am telling them is "control" or "command". I don't need to know the browser or anything, just if the computer is a Mac.

Here is an outline of what I'm asking is possible:

if (operating_system == Mac)
{
    echo "command";
}
else
{
    echo "control";
}

Answer 1

Create a page: identifier.php

<?php
$user_agent = getenv("HTTP_USER_AGENT");

if(strpos($user_agent, "Win") !== FALSE)
$os = "Windows";
elseif(strpos($user_agent, "Mac") !== FALSE)
$os = "Mac";
?>

then include it on the header of your site.

After that you can use it like this:

<?php
if($os === "Windows")
{

}
elseif($os === "Mac")
{

} 
?>

Edit:

For windows phone:

if (strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'windows phone os') > 0) {
    $mobile_browser = 1;
  }