User agent, extract OS and browser from string

问题

I'd like to extract full the OS name and browser from the user agent string. How can I do this?

回答1:

I think it is tricky to get the full OS name and full browser name since many browsers identify themselves differently. You will probably need some fancy regex and then it might not even work 100% of the time.

Here is the simple method I use to identify the browser. You may be able to adapt it to suit your needs.

<?php

public static function getUserAgent()
{
    static $agent = null;

    if ( empty($agent) ) {
        $agent = $_SERVER['HTTP_USER_AGENT'];

        if ( stripos($agent, 'Firefox') !== false ) {
            $agent = 'firefox';
        } elseif ( stripos($agent, 'MSIE') !== false ) {
            $agent = 'ie';
        } elseif ( stripos($agent, 'iPad') !== false ) {
            $agent = 'ipad';
        } elseif ( stripos($agent, 'Android') !== false ) {
            $agent = 'android';
        } elseif ( stripos($agent, 'Chrome') !== false ) {
            $agent = 'chrome';
        } elseif ( stripos($agent, 'Safari') !== false ) {
            $agent = 'safari';
        } elseif ( stripos($agent, 'AIR') !== false ) {
            $agent = 'air';
        } elseif ( stripos($agent, 'Fluid') !== false ) {
            $agent = 'fluid';
        }

    }

    return $agent;
}

回答2:

@augustknight: Note, the IE11 doesn´t send a "MSIE" token, i would suggest to add a match to a Trident token.

IE 11 user agent sample:

Mozilla/5.0 (Windows NT 6.1; Trident/7.0; rv:11.0) like Gecko

change code:

<?php
public static function getUserAgent()
{
    static $agent = null;

    if ( empty($agent) ) {
        $agent = $_SERVER['HTTP_USER_AGENT'];

        if ( stripos($agent, 'Firefox') !== false ) {
            $agent = 'firefox';
        } elseif ( stripos($agent, 'MSIE') !== false ) {
            $agent = 'ie';
        } elseif ( stripos($agent, 'Trident') !== false ) {
            $agent = 'ie';
        } elseif ( stripos($agent, 'iPad') !== false ) {
            $agent = 'ipad';
        } elseif ( stripos($agent, 'Android') !== false ) {
            $agent = 'android';
        } elseif ( stripos($agent, 'Chrome') !== false ) {
            $agent = 'chrome';
        } elseif ( stripos($agent, 'Safari') !== false ) {
            $agent = 'safari';
        } elseif ( stripos($agent, 'AIR') !== false ) {
            $agent = 'air';
        } elseif ( stripos($agent, 'Fluid') !== false ) {
            $agent = 'fluid';
        }

    }

    return $agent;
}

回答3:

There's also a built-in function in PHP to achieve this and more: get_browser().

$agent = get_browser();
echo $agent->platform;
echo $agent->parent; // or $agent->browser . $agent->version

来源：https://stackoverflow.com/questions/9693574/user-agent-extract-os-and-browser-from-string

标签

php

browser

operating-system

user-agent