[RESOLVED] Time Zone & Day Light Savings

[floppydrivez]

This one might be hard to explain, but I am going to give it a shot. Ok, a range of initial members all enter the time of a event and specify their time zone. When another member views that event, I want it to be converted to their timezone which they have selected from the database.

I am currently using http://www.phpclasses.org/browse/package/3432.html, but it does not compensate for DST. Does anyone have any better suggestions?

[floppydrivez]

So I figured this one...

The key when a start time is entered is to change it to the GMT time zone using gmmktime. Then convert it according to the offset of the users timezone. I found this on php.net, but I will convert it to a class to fit my needs.

<?php
// Get info about time zone relationship to GMT at: http://wwp.greenwichmeantime.com/

// SELECT TIME ZONE
$sign = "-"; // Whichever direction from GMT to your timezone.
$h = "8"; // Hour for time zone goes here e.g. +8 or -4, just remove the + or -
$dst = "true"; // Just insert "true" if your location uses daylight savings time or "false" if it does not

// DETECT AND ADJUST FOR DAYLIGHT SAVINGS TIME
if ($dst) {
    $daylight_saving = date('I');
    if ($daylight_saving){
        if ($sign == "-"){ $h=$h-1;  }
        else { $h=$h+1; }
    }
}

// FIND DIFFERENCE FROM GMT
$hm = $h * 60;
$ms = $hm * 60;

// SET CURRENT TIME
if ($sign == "-"){ $timestamp = time()-($ms); }
else { $timestamp = time()+($ms); }

// SAMPLE OUTPUT
$gmdate = gmdate("m/d/Y g:i:s A", $timestamp);

echo "Your current time now is :  $gmdate . ";
?>