alofoxx

So the problem your having is your not updating the expiration to now+30 mins everytime they do something. PHP runs on the server and not on the user's browser - so it will only know they have done something when it causes the page to load by refreshing or clicking on a link. In your code where you check if the session is expired - if it is not you need to set the expiration time to now+30 mins or whatever. This does not handle "moving the mouse". Since this is based on server requests PHP is not going to know what the user is doing on the browser like typing or moving the mouse or scrolling. That takes something client-side like javascript. It's a bit more complicated too - I would suggest having a pop up (modal or confirm dialog) saying "hey your about to be logged out! click ok to stay logged in!" and then if they click ok reload the page or something. To do it without a page reload you will need to use ajax calls to tell the server your user is still there. (more advanced)

Oh darn - This post beat me to it!

https://en.wikipedia.org/wiki/Five-dimensional_space It looks like its the shape of it like a hyper cell.. kinda like a dot matrix barcode but with the other 4 dimensions applied. in basic terms every layer and position of etched glass means something to the computer reading it.

The future may be now: We may not have fancy predictive crime police (yet), but now there is "'Five-dimensional' glass discs can store data for up to 13.8 billion years" (source - theVerge) Snips: "Scientists from the University of Southampton in the UK have created a new data format that encodes information in tiny nanostructures in glass. A standard-sized disc can store around 360 terabytes of data, with an estimated lifespan of up to 13.8 billion years even at temperatures of 190°C." "Although the expensive lasers needed to fabricate the discs aren't going to move out of the lab any time soon, the discs can be read relatively easily, with the team from Southampton suggesting the equivalent of a DVD player for 5D information could be developed in decades." There are other new formats being developed to compete with this: "Hitachi is working on its own form of glass-based data storage, and in 2014, researchers simulated a "liquid hard drive" that would use nanoparticles suspended in a solution to store data. At least storing data in glass discs that can outlive the Earth sounds almost normal by comparison." --- (Source - University of Southampton): " Using nanostructured glass, scientists from the University’s Optoelectronics Research Centre (ORC) have developed the recording and retrieval processes of five dimensional (5D) digital data by femtosecond laser writing. The storage allows unprecedented properties including 360 TB/disc data capacity, thermal stability up to 1,000°C and virtually unlimited lifetime at room temperature (13.8 billion years at 190°C ) opening a new era of eternal data archiving. As a very stable and safe form of portable memory, the technology could be highly useful for organisations with big archives, such as national archives, museums and libraries, to preserve their information and records." --- How its made: youtube: Fabrication process for 5D optical storage

Working on times for you!