PHP or JavaScript: Which is Better for Determining a User's Time Zone?

Determining a User's Time Zone: PHP or JavaScript?

When determining a web user's time zone, both PHP and JavaScript have their advantages.

PHP

PHP's ability to store the time zone in a session variable ($_SESSION['time']) makes it convenient for subsequent access. The following code snippet illustrates this approach:

<?php
    session_start();
    $timezone = $_SESSION['time'];
?>

JavaScript

JavaScript, on the other hand, requires an asynchronous request to determine the user's time zone. This approach involves sending the visitor's time zone (visitortimezone) to a server-side script (timezone.php) using jQuery's AJAX functionality:

$(document).ready(function() {
    if("<?php echo $timezone; ?>".length==0){
        var visitortime = new Date();
        var visitortimezone = "GMT " + -visitortime.getTimezoneOffset()/60;
        $.ajax({
            type: "GET",
            url: "http://example.com/timezone.php",
            data: 'time='+ visitortimezone,
            success: function(){
                location.reload();
            }
        });
    }
});

Server-Side Script (timezone.php)

The following PHP script is placed on the server and receives the time zone information from the AJAX request:

<?php
    session_start();
    $_SESSION['time'] = $_GET['time'];
?>

Usage

Once the time zone has been determined (either via PHP or JavaScript), it can be used for various purposes, such as adjusting time values or displaying localized time information.

The above is the detailed content of PHP or JavaScript: Which is Better for Determining a User's Time Zone?. For more information, please follow other related articles on the PHP Chinese website!