<?php // two-level sort for timezones. if(! function_exists('timezone_cmp')) { function timezone_cmp($a, $b) { if(strstr($a,'/') && strstr($b,'/')) { if ( t($a) == t($b)) return 0; return ( t($a) < t($b)) ? -1 : 1; } if(strstr($a,'/')) return -1; if(strstr($b,'/')) return 1; if ( t($a) == t($b)) return 0; return ( t($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') { $timezone_identifiers = DateTimeZone::listIdentifiers(); $o ='<select id="timezone_select" name="timezone">'; usort($timezone_identifiers, 'timezone_cmp'); $continent = ''; foreach($timezone_identifiers as $value) { $ex = explode("/", $value); if(count($ex) > 1) { if($ex[0] != $continent) { if($continent != '') $o .= '</optgroup>'; $continent = $ex[0]; $o .= '<optgroup label="' . t($continent) . '">'; } if(count($ex) > 2) $city = substr($value,strpos($value,'/')+1); else $city = $ex[1]; } else { $city = $ex[0]; if($continent != t('Miscellaneous')) { $o .= '</optgroup>'; $continent = t('Miscellaneous'); $o .= '<optgroup label="' . t($continent) . '">'; } } $city = str_replace('_', ' ', t($city)); $selected = (($value == $current) ? " selected=\"selected\" " : ""); $o .= "<option value=\"$value\" $selected >$city</option>"; } $o .= '</optgroup></select>'; 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', $fmt = "Y-m-d H:i:s") { // Slight hackish adjustment so that 'zero' datetime actually returns what is intended // otherwise we end up with -0001-11-30 ... // add 32 days so that we at least get year 00, and then hack around the fact that // months and days always start with 1. if(substr($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'); $o = datesel('',1920,$y,true,$year,$month,$day); 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) { $o = ''; $o .= "<select name=\"{$pre}year\" class=\"{$pre}year\" size=\"1\">"; if($allow_blank) { $sel = (($y == '0000') ? " selected=\"selected\" " : ""); $o .= "<option value=\"0000\" $sel ></option>"; } for($x = $ymax; $x >= $ymin; $x --) { $sel = (($x == $y) ? " selected=\"selected\" " : ""); $o .= "<option value=\"$x\" $sel>$x</option>"; } $o .= "</select> <select name=\"{$pre}month\" class=\"{$pre}month\" size=\"1\">"; for($x = 0; $x <= 12; $x ++) { $sel = (($x == $m) ? " selected=\"selected\" " : ""); $y = (($x) ? $x : ''); $o .= "<option value=\"$x\" $sel>$y</option>"; } $o .= "</select> <select name=\"{$pre}day\" class=\"{$pre}day\" size=\"1\">"; for($x = 0; $x <= 31; $x ++) { $sel = (($x == $d) ? " selected=\"selected\" " : ""); $y = (($x) ? $x : ''); $o .= "<option value=\"$x\" $sel>$y</option>"; } $o .= "</select>"; 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) { $localtime = datetime_convert('UTC',date_default_timezone_get(),$posted_date); $abs = strtotime($localtime); $etime = time() - $abs; if ($etime < 1) { return t('less than a second ago'); } $a = array( 12 * 30 * 24 * 60 * 60 => array( t('year'), t('years')), 30 * 24 * 60 * 60 => array( t('month'), t('months')), 7 * 24 * 60 * 60 => array( t('week'), t('weeks')), 24 * 60 * 60 => array( t('day'), t('days')), 60 * 60 => array( t('hour'), t('hours')), 60 => array( t('minute'), t('minutes')), 1 => array( t('second'), t('seconds')) ); foreach ($a as $secs => $str) { $d = $etime / $secs; if ($d >= 1) { $r = round($d); return $r . ' ' . (($r == 1) ? $str[0] : $str[1]) . t(' ago'); } } }} // Returns age in years, given a date of birth, // the timezone of the person whose date of birth is provided, // and the timezone of the person viewing the result. // Why? Bear with me. Let's say I live in Mittagong, Australia, and my // birthday is on New Year's. You live in San Bruno, California. // When exactly are you going to see my age increase? // A: 5:00 AM Dec 31 San Bruno time. That's precisely when I start // celebrating and become a year older. If you wish me happy birthday // on January 1 (San Bruno time), you'll be a day late. function age($dob,$owner_tz = '',$viewer_tz = '') { if(! intval($dob)) return 0; if(! $owner_tz) $owner_tz = date_default_timezone_get(); if(! $viewer_tz) $viewer_tz = date_default_timezone_get(); $birthdate = datetime_convert('UTC',$owner_tz,$dob . ' 00:00:00+00:00','Y-m-d'); list($year,$month,$day) = explode("-",$birthdate); $year_diff = datetime_convert('UTC',$viewer_tz,'now','Y') - $year; $curr_month = datetime_convert('UTC',$viewer_tz,'now','m'); $curr_day = datetime_convert('UTC',$viewer_tz,'now','d'); if(($curr_month < $month) || (($curr_month == $month) && ($curr_day < $day))) $year_diff--; return $year_diff; }