Mobile Detect
Mobile_Detect is a lightweight PHP class for detecting mobile devices
...It includes a rich set of detection rules covering device brands, operating systems, and browser engines so developers can tailor responses (views, assets, or layouts) based on client form factor. Its API is simple: isMobile(), isTablet(), or deviceFamily() methods make branching logic intuitive. The library is used in server-rendered PHP apps, CMS themes, and frameworks to serve mobile-friendly templates or redirect users to mobile versions. Because it is pattern-driven and optimized for fast matching, it adds minimal runtime overhead to request handling. By abstracting away the complexity of UA sniffing, Mobile-Detect helps teams gracefully support multi-device clients without duplicating detection logic.