Detecting Android Browser (from v. 1 to 2.3 firmware) in PHP

问题

I need to detect if the browser is Android (only from 1 to version 2.3), would this work?

if(preg_match('/Android [1-2.3]/', $_SERVER['HTTP_USER_AGENT'])) {
 echo 'something';
}

回答1:

Following Regex can match exactly Android [1-2.3] .

Android ([1](?:\.[0-9])?|[2](?:\.[0-3])?$)

For MSIE [6-8] Android [1-2.3]

MSIE [6-8] Android ([1](?:\.[0-9])?|[2](?:\.[0-3])?)$

Running regex here

回答2:

I don't know really know what the UserAgents for those devices look like, but the pattern you have is not likely to be what you want. I suspect you want something more along the lines of:

'/Android (1\.\d|2\.[012])/'

There are lots of different ways you could write the pattern, but essentially this one says that Android needs to be followed by either 1.{any number} or 2.0, 2.1 or 2.2

回答3:

I would like to suggest you use Browscap for browser detection.

get_browser function doc http://php.net/manual/en/function.get-browser.php

'Actual' browscap .ini file downloads http://tempdownloads.browserscap.com

It should be noted that the project is closed at the moment and further update of browser-database in question.

Usage exapmle in your case:

$browser = get_browser(null, true);
if (array_key_exists('Platform', $browser) && array_key_exists('Platform_Version', $browser) && $browser['Platform'] == 'Android' && $browser['Platform_Version'] <= 2.3) {
    echo 'Android <2.3 version';
}

回答4:

You can use the following regex to get the Android browser version, be it in x.x.x format or x.x. I have a regex to determine if the device is using one of the versions I'm supporting (2.3.x +):

/Android ([2].?[3-9].?[0-9]?|[3].?[0-9].?[0-9]?|[4].?[0-9].?[0-9]?)/

回答5:

From github I found this code very useful: https://gist.github.com/Abban/3939726

if(is_old_android('2.3')) {
  echo 'This device has Android 2.3 or lower';
}

function is_old_android($version = '4.0.0'){
   if(strstr($_SERVER['HTTP_USER_AGENT'], 'Android')){

     preg_match('/Android (\d+(?:\.\d+)+)[;)]/', $_SERVER['HTTP_USER_AGENT'], $matches);

     // $matches[0]= Android 4.1.2;
     // $matches[1]= 4.1.2

        return version_compare($matches[1], $version, '<=');
    }
}

Very useful function: version_compare

来源：https://stackoverflow.com/questions/14021976/detecting-android-browser-from-v-1-to-2-3-firmware-in-php

标签

php

regex

preg-match

browser-detection