Homezonic

<?php

return (new PhpCsFixer\Config())
    ->setRules([
        '@PSR2'                                  => true,
        'array_indentation'                      => true,
        'array_syntax'                           => ['syntax' => 'short'],
        'combine_consecutive_unsets'             => true,
        'phpdoc_separation'                      => true,
        'multiline_whitespace_before_semicolons' => true,

Homezonic

<?php
//on pageload, we have to start the session.
session_start();

$idletime=60;// after 60 seconds the user gets logged out, put your time in seconds.

if (time()-$_SESSION['timestamp']>$idletime){ 
    session_destroy();
    session_unset();
    header('Location: ../index.php'); //then redirect the user away from the current page to a lockscreen page or index.