如何查找用户是否正在通过手机访问我的网站？

Question

I would like to identify if a user visits my website using a mobile phone device (not Ipad or any tablets) or the opposite, if simply is using a desktop/tablet device.

My goal is to load different style.css because of the non responsiveness of my site.

I know how to make if statements for this in my PHP but I do not know how to do the identification part in PHP. Also, any solutions using javascript are acceptable.

For example, mobile phones I consider

Iphone (Safari, Chrome, Firefox)
Android  (Safari, Chrome, Firefox)
Windows Phone (IE mobile)

Thank you

Answer 1

instead of php and jquery you probably want to explore the option of @media queries in CSS

the following article explains the process of setting them up in your stylesheet Different Stylesheets for Differently Sized Browser Windows