使用php获取主要Android版本号

Question

I want to log the Majorn number of the Android version (first number) of a user. I'll use a PHP-script, but it don't work. The string stills empty. What do I wrong?

$txt = $_SERVER['HTTP_USER_AGENT'];
$reg = '/Android (\d+).(\d+)\s+/';
$a   = array();

preg_match($reg, $txt, $a);

$str_version = $a[1];

Thanks in advance!

Answer 1

Remove the whitespace escape sequence (\s) at the end of your regex, as most Android versions consists of 3 numbers separated by decimal points, for example 4.4.2:

$reg = '/Android (\d+)\.(\d+)/';