getting timezoneoffset using js in php

[Adrian Parker]

I have a php page which uses checks to see if the tz variable is in the
argument list.. if not, it recalls the page using javascript with the added
tz argument.. if I run it locally here in the UK, the tz is set to 0 which
is correct. If I run it on a US server, it initially returns -1, but in IE
if I do a ctrl-refresh, it correctly gets it as 0.

Any ideas ?

<?php
if (!isset($_GET['tz'])) print "
<script type=\"text/javascript\">
now = new Date();
window.location .href=\"$_SERVE R[PHP_SELF]?tz=\" + (now.getTimezon eOffset() /
60);
</script>";

[Grant Wagner]

Adrian Parker wrote:

I have a php page which uses checks to see if the tz variable is in the
argument list.. if not, it recalls the page using javascript with the added
tz argument.. if I run it locally here in the UK, the tz is set to 0 which
is correct. If I run it on a US server, it initially returns -1, but in IE
if I do a ctrl-refresh, it correctly gets it as 0.

Any ideas ?

<?php
if (!isset($_GET['tz'])) print "
<script type=\"text/javascript\">
now = new Date();
window.location .href=\"$_SERVE R[PHP_SELF]?tz=\" + (now.getTimezon eOffset() /
60);
</script>";

--test.php--

<?php
if (!isset($_GET['tz'])) print "
<script type=\"text/javascript\">
now = new Date();
window.location .href=\"$_SERVE R[PHP_SELF]?tz=\" + (now.getTimezon eOffset() /
60);
</script>";

print $_GET['tz'];
?>

Loaded from Apache/1.3.31 (Unix) mod_ssl/2.8.17 OpenSSL/0.9.7d PHP/4.3.9

Loaded into IE 6.0.2800 (pre Windows XP Service Pack 2) and IE 6.0.2900 (Windows
XP Service Pack 2), as well as Mozilla Firefox 0.10.1 (1.0PR) all display "6"
(I'm currently in CDT - Central Daylight Savings Time). So it appears to be
working correctly. You can streamline the JavaScript a bit by making it:

<script type=\"text/javascript\">
window.location .href=\"$_SERVE R[PHP_SELF]?tz=\" + ((new
Date()).getTime zoneOffset() / 60);
</script>

But that shouldn't affect the result.

--
Grant Wagner <gw*****@agrico reunited.com>
comp.lang.javas cript FAQ - http://jibbering.com/faq

[Dr John Stockton]

JRS: In article <41************ ***@agricoreuni ted.com>, dated Tue, 2
Nov 2004 21:41:09, seen in news:comp.lang. javascript, Grant Wagner
<gw*****@agrico reunited.com> posted :

Loaded into IE 6.0.2800 (pre Windows XP Service Pack 2) and IE 6.0.2900 (Windows
XP Service Pack 2), as well as Mozilla Firefox 0.10.1 (1.0PR) all display "6"
(I'm currently in CDT - Central Daylight Savings Time). So it appears to be
working correctly. You can streamline the JavaScript a bit by making it:

<script type=\"text/javascript\">
window.locatio n.href=\"$_SERV ER[PHP_SELF]?tz=\" + ((new
Date()).getTim ezoneOffset() / 60);
</script>

But that shouldn't affect the result.

I see possible difficulties if the code is executed with settings for
Newfoundland, India, etc., where getTimezoneOffs et()/60 is not integer.
And, indeed, where it is negative.

--
© John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v4.00 MIME. ©
Web <URL:http://www.merlyn.demo n.co.uk/> - w. FAQish topics, links, acronyms
PAS EXE etc : <URL:http://www.merlyn.demo n.co.uk/programs/> - see 00index.htm
Dates - miscdate.htm moredate.htm js-dates.htm pas-time.htm critdate.htm etc.