Log user login time with php and show it on website

Question

I have a question about saving the moment a person logged in on my website. Let's say User John logged into my website on 17 January 2018 time: 16:24.

I want to put that date in my footer on my website, but how?

Is there a just a simple way with a PHP function?

Example:

John - Logged in sice 17 January 2018 16:24

Answer 1

when user logs in, set the time in session :

$_SESSION['logged_in_datetime'] = date("d M Y H:i");

and then, if you want to just display it and do not want to query the db,

<?php 
echo $_SESSION['username']."  - Logged in since ".$_SESSION['logged_in_datetime'];
?>

Answer 2

It is a simple sql query. You should have a datetime type field in your database table and you can query the user and show the last logged time value.