1)Php in Facebook
Facebook still uses PHP, but it has built a compiler for it so it can be turned into native code on its web servers, thus boosting performance. Facebook uses Linux but has optimized it for its own purposes (especially in terms of network throughput)
Where they use ↓
PHP – Facebook Login
Login With Facebook. Need to go https://developers.facebook.com/apps/ and click on add a new group button to make the app ID. Choose Website. …
fbconfig. php file overview. …
Login page Overview. Login page is used to login into FB. …