<?php
+// two-level sort for timezones.
+
if(! function_exists('timezone_cmp')) {
function timezone_cmp($a, $b) {
if(strstr($a,'/') && strstr($b,'/')) {
- if ($a == $b) return 0;
- return ($a < $b) ? -1 : 1;
+ if ( t($a) == t($b)) return 0;
+ return ( t($a) < t($b)) ? -1 : 1;
}
if(strstr($a,'/')) return -1;
if(strstr($b,'/')) return 1;
return ( t($a) < t($b)) ? -1 : 1;
}}
+// emit a timezone selector grouped (primarily) by continent
if(! function_exists('select_timezone')) {
function select_timezone($current = 'America/Los_Angeles') {
}
else {
$city = $ex[0];
- if($continent != 'Miscellaneous') {
+ if($continent != t('Miscellaneous')) {
$o .= '</optgroup>';
- $continent = 'Miscellaneous';
+ $continent = t('Miscellaneous');
$o .= '<optgroup label="' . t($continent) . '">';
}
}
return $o;
}}
+// General purpose date parse/convert function.
+// $from = source timezone
+// $to = dest timezone
+// $s = some parseable date/time string
+// $fmt = output format
if(! function_exists('datetime_convert')) {
function datetime_convert($from = 'UTC', $to = 'UTC', $s = 'now', $fmt = "Y-m-d H:i:s") {
- $d = new DateTime($s, new DateTimeZone($from));
- $d->setTimeZone(new DateTimeZone($to));
- return($d->format($fmt));
+
+ // Slight hackish adjustment so that 'zero' datetime actually returns what is intended
+ // otherwise we end up with -0001-11-30 ...
+ // add 32 days so that we at least get year 00, and then hack around the fact that
+ // months and days always start with 1.
+
+ if(substr($s,0,10) == '0000-00-00') {
+ $d = new DateTime($s . ' + 32 days', new DateTimeZone('UTC'));
+ return str_replace('1','0',$d->format($fmt));
+ }
+
+ $d = new DateTime($s, new DateTimeZone($from));
+ $d->setTimeZone(new DateTimeZone($to));
+ return($d->format($fmt));
}}
+// wrapper for date selector, tailored for use in birthday fields
+
function dob($dob) {
list($year,$month,$day) = sscanf($dob,'%4d-%2d-%2d');
$y = datetime_convert('UTC',date_default_timezone_get(),'now','Y');
return $o;
}
+
+// returns a date selector.
+// $pre = prefix (if needed) for HTML name and class fields
+// $ymin = first year shown in selector dropdown
+// $ymax = last year shown in selector dropdown
+// $allow_blank = allow an empty response on any field
+// $y = already selected year
+// $m = already selected month
+// $d = already selected day
+
if(! function_exists('datesel')) {
function datesel($pre,$ymin,$ymax,$allow_blank,$y,$m,$d) {
return $o;
}}
+// implements "3 seconds ago" etc.
+// based on $posted_date, (UTC).
+// Results relative to current timezone
+// Limited to range of timestamps
if(! function_exists('relative_date')) {
function relative_date($posted_date) {
}}
+
+// Returns age in years, given a date of birth,
+// the timezone of the person whose date of birth is provided,
+// and the timezone of the person viewing the result.
+// Why? Bear with me. Let's say I live in Mittagong, Australia, and my
+// birthday is on New Year's. You live in San Bruno, California.
+// When exactly are you going to see my age increase?
+// A: 5:00 AM Dec 31 San Bruno time. That's precisely when I start
+// celebrating and become a year older. If you wish me happy birthday
+// on January 1 (San Bruno time), you'll be a day late.
+
function age($dob,$owner_tz = '',$viewer_tz = '') {
if(! intval($dob))
return 0;