One of the common tasks the web application might be required to perform, especially the app using some kind of a CMS, is to save the history of data changes. Your client for sure will want the answer to this simple question - If I mess this up or delete by accident can we bring it back? Well, DB backup is one thing and quick recovery is another - let's talk about latter one.
Facebook iframe app’s session is losing in Internet Explorer when doing a second redirection inside the facebook iframe app.The main reason is ,by default IE wont allow cookies in its priavacy settings If cookies not available means session is also not available for our Facebook iframe app in IE.
When we are doing an insert of huge no.of rows into an SQL table ,Normally we will try to write separate insert quries this may lead us to a long duration of execution time and we can increase the speed of executing SQL quries by adding all the rows into a single insert query.
This article is helpful only if you have the following situation:
A web app which uses facebook login to login its users and if a user is logged out from his/her facebook account through another browser tab, then your app dont know that he is logged out out or not from his facebook account and he/she will remain as logged in your web application.Its ok if you have no problem with this situation.But if you want to forcefully logout the user from your application if he is logged out from his facebook account means you can try this example.This example uses periodic ajax calls to facebook's graph api to check whether the user is logged in or not.