How to detect if a user leaves a page in PHP
javascript
Solution
With 100% reliability, no, it's not possible. Since leaving a particular page is a client-side operation, you have 0 control over what the client does. You can register an `onbeforeunload` handler via Javascript and hope that the client browser supports it. But again, support for this isn't universal.
Problem
There is this function which i want to execute in case the user leaves a particular page. This function will basically change all of the data within a certain column in my database. So in case the user leaves this page, i want this function to be performed by the system. Is there a way to detect if the user already left the page. Thanks!