DateTime input convert between timezones in PHP

Question

I have an input box that grabs local time

date_default_timezone_set('America/Los_Angeles');
echo "<input type='datetime-local' name='fromDate' class='dates'>";

When I enter 12-31-2014 10:00:00 PM in the input

echo $_POST['fromDate'];

Response: 2014-12-31T22:00:00

$test = new DateTime($_POST['fromDate']);
echo $test;

I get 2014-12-31T22:00:00 America/Los_Angeles

Then when I convert

$from_dateGMT  = new DateTime($_POST['fromDate'], new DateTimeZone('Europe/Paris'));
$from_date = $from_dateGMT->format('Y-m-d\TH:i:s');
echo $from_date;

I get 2014-12-31T22:12:00 UTC , which is the same time listed above and should be adding 8 hours.

What am I doing wrong?

I don't deal with dates/times in PHP ever, so this is a learning experience for me.

Answer 1

Perhaps this will work

$test = new DateTime($_POST['fromDate'], new DateTimeZone('America/Los_Angeles'));
$test->setTimezone(new DateTimeZone('Europe/Paris'));
echo $test->format('Y-m-d\TH:i:s');

At least that is how it is done in php manual here: http://us2.php.net/manual/en/datetime.settimezone.php