How to handle user online status when he/she close the browser?

Question

I am having table to track user online status by setting \'is_online\' field to 1. Now User get logged in the site and shut down his/her system or power down at that time he

Answer 1

You can use jquery to update your site each X time, so a function is executed each 10 seconds, as following code:

function updateTheBBDD(){
    ... calling mysql_connect -> mysql_insert -> mysql_close
}

setInterval("updateTheBBDD()",10000);

Also, when painting the user status monitor instead of consulting the BD and:

1->green
0->red

You should:

actual - time > 10  ---> red
actual - time <= 10 ---> green