How Can I Determine a User's Time Zone Using PHP and JavaScript?

Determining a User's Time Zone

Introduction:

Determining a user's time zone can be crucial for various web applications, such as scheduling events or displaying time-sensitive information correctly.

PHP Option:

To obtain the user's time zone using PHP, you can utilize the session variable method outlined in the provided answer:

session_start();
$timezone = $_SESSION['time'];

JavaScript Option:

Alternatively, you can employ a JavaScript solution, which involves a combination of jQuery and PHP:

JavaScript Code:

$(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();
      }
    });
  }
});

PHP Code (timezone.php):

session_start();
$_SESSION['time'] = $_GET['time'];

How it Works:

1. The JavaScript code first initializes the user's time zone variable visitortimezone.
2. It then sends an AJAX request to the PHP script timezone.php to set the user's time zone in the session variable time.
3. Upon a successful AJAX request, the page is reloaded.
4. The PHP code in the original page can now read the $timezone variable.

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