As strange as I find this, I have not been able to find a good PHP function anywhere which will do an intelligent parse of a user agent string? Googled it for about 20 minutes now.
I have the string already, I just need something that will chop it up and give me at least browser/ver/os.
Know of a good snippet anywhere?
The get_browser() function has been available in PHP for quite a long a time.
The PHP manual is free, can be downloaded in various formats and viewed online (with comments)
https://github.com/browscap/browscap-php - this is a standalone library that aims to replace get_browser function. For shared hostings it seems to be a better option.
Works on: PHP 5
You can try to use: https://github.com/tobie/ua-parser. This is multi-language tool to parsing user agent string. For PHP is here: https://github.com/tobie/ua-parser/tree/master/php
Try out ThaDafinser/UserAgentParser it's an abstraction for many available user agent parsers.
So if you are not happy with one - just switch to another (or combine them)
You can try it out here
There is a PHP class library i found out, and it has worked so well for me. It is in the link below.
https://www.toms-world.org/blog/parseuseragentstring
It is lightweight and just does what I wanted (Browser, Version, OS, Mobile/PC, and much more) in a memory-friendy manner.
来源：https://stackoverflow.com/questions/2122786/code-to-parse-user-agent-string