Through the action time, if the action time times out, it will be kicked out! Using mktime is a good time calculation function
that can easily calculate the time difference. The smallest unit is seconds.
Function
function user_mktime($onlinetime){
$new_time = mktime();
echo $new_time-$onlinetime;
if($new_time-$onlinetime > 100){
echo "Login timeout";
session_destroy();
}else{
$_SESSION[times]=mktime() ;
}
}
?>
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
