如何分辨in-app browser

I developed an app for iOS and Android which accesses an HTML file from my webserver using the in-app browser (Webview). I don't want that a user can access this file without using the app. Is there a possibility to detect, if the user is accessing the file with the app or directly via a browser on this smartphone / tablet / computer? I think that a solution with PHP is much better, because Javascript can be switched off. At least Google Analytics can differentiate between Safari and Safari (in-app). It should work with every version of iOS and Android. Thanks for your help. Solution After many attempts I finally found a working solution for me! iOS: You can detect the difference between Safari and the in-app browser using the user agent. Probably there's a nicer solution, but it works. // Safari (in-app) if ((strpos($_SERVER['HTTP_USER_AGENT'], 'Mobile/') !== false) && (strpos($_SERVER['HTTP_USER_AGENT'], 'Safari/') == false) { echo 'Safari (in-app)'; } Android: The package name from the app is stored in the PHP variable $_SERVER['HTTP_X_REQUESTED_WITH']. // Android (in-app) if($_SERVER['HTTP_X_REQUESTED_WITH'] == "com.company.app") { echo 'Android (in-app)'; }

 喺iOS，chrome同opera都會有Safari寫喺user agent度

Ref: http://stackoverflow.com/questions/16383776/detect-in-app-browser-webview-with-php-javascript