Detect Facebook Mobile Browser

Question

Is it somehow possible to detect Facebook's mobiles apps' browser via PHP or JS? My apps all have problems inside their browser (in native browser not!) and I want to show a warning notice.

Alternatively, is there a possibility to directly open the website in a external browser?

Answer 1

这在JavaScript中适用于我：

if (navigator.userAgent.match(/(iPod|iPhone|iPad)/) && navigator.userAgent.match(/FBAV/i)) {
    //iOS Facebook App Browser detected
}

有关用户代理的更多信息：Is this a Facebook for iOS WebView User Agent?

Afaik无法强制网站在任何外部浏览器中打开，只有用户可以这样做。