How to Retrieve Client's Timezone Using AJAX with jQuery and PHP
,Question:
How can I determine the timezone used by a client in a PHP application, ideally returning the time offset in seconds from UTC?
,Answer:
Below is a solution that employs jQuery and PHP:
PHP Code:
<code class="php">session_start(); $timezone = $_SESSION['time'];</code>
This code initializes the session and retrieves the client's timezone from the session variable 'time'.
jQuery Code:
<code class="javascript">$(document).ready(function() { if ("<?php echo $timezone; ?>".length==0){ var visitortime = new Date(); var visitortimezone = "GMT " + -visitortime.getTimezoneOffset()/60; $.ajax({ type: "GET", url: "http://domain.com/timezone.php", data: 'time='+ visitortimezone, success: function(){ location.reload(); } }); } });</code>
This jQuery code runs on the client side when the page loads. It detects whether the timezone has already been set and, if not, sends the current client timezone to a PHP script named 'timezone.php'.
timezone.php Script:
<code class="php">session_start(); $_SESSION['time'] = $_GET['time'];</code>
This PHP script simply stores the client's timezone in the session variable 'time'.
Usage:
<code class="html"><script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script></code>
Once this setup is complete, the PHP code will be able to access the client's timezone through the session variable 'time'. The timezone will be represented as a UTC/GMT time zone offset in seconds, such as -7 for GMT-7.
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