How to determine whether the client imports different files in PHP

Question

How to write judgment in php, if it is accessed by mobile phone, introduce the following file

include dirname(__FILE__) . '/wap.tpl';

If accessed via computer, import this file

include dirname(__FILE__) . '/pc.tpl';

How to implement
How to write php code?

Answer 1

http://wenwen.sogou.com/z/q70...

http://www.cnblogs.com/scofi/...

http://www.cnblogs.com/zdz820...