[wp-trac] [WordPress Trac] #53780: PHP 8.1: DateTimeZone::getTransitions() change

[WordPress Trac]

#53780: PHP 8.1: DateTimeZone::getTransitions() change
--------------------------+------------------------------
 Reporter:  autotutorial  |       Owner:  (none)
     Type:  defect (bug)  |      Status:  reopened
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Date/Time     |     Version:
 Severity:  normal        |  Resolution:
 Keywords:  php81 close   |     Focuses:
--------------------------+------------------------------

Comment (by autotutorial):

 Good evening everyone, I thought there was a probable solution but I'll
 explain bug 7752 which was resolved by php 8.1.6RC. Here is a non-
 exhaustive list of things that happen https://github.com/php/php-
 src/issues/7752#issuecomment-1085765090

 In this code example I use if I have a single result and the last
 transition is less than or equal to the timestamp and 7200 is equal to
 that offset means from bug 8.1 :)

 {{{
 <?php

 $tz_string = 'Europe/Paris';
 $timezone_utc = timezone_open('UTC');
 $timezone = timezone_open($tz_string);
 //$lasttimestamp = 4141328400;
 $lasttimestamp = 4160077200;
 $lasttimestamp2 = '' . $lasttimestamp;
 $to_min = strtr($lasttimestamp2, array('-2147483648' => '-2147483647',
 '-2147483647' => '-2147483647', '2147483647' => '2147483646'));
 $to_min = (int) $to_min;
 $to_min = '' . $to_min;
 $to_min = strtr($to_min, array('-2147483648' => '2147483647'));
 $to_min = (int) $to_min;
 $from_max = 2147483647;
 $to_min2 = 2147483647;
 if($to_min  > 2147483647 || -2147483648 > $to_min) {
 $from_max = '2147483648';
 $from_max = (int) $from_max;
 } elseif($to_min < 2147483647) {
 $to_min2 = 2147483646;
 }
 if($from_max > $to_min2) {
 $lasttimestamp = (int) $lasttimestamp;
 $timestampsec = '+0 sec';
 $date1 = date_create('1970-01-01 00:00:00', $timezone_utc);
 $date2 = date_modify($date1, $timestampsec);
 $obj_rt = is_object($date2);
 $key3 = 1;
 $key4 = 1;
 if($obj_rt) {
 $transitions = timezone_transitions_get($timezone, $lasttimestamp);
 $count = count($transitions);
 if(2 > $count) {
 $transitions2 = timezone_transitions_get($timezone);
 $key2 = count($transitions2) - 1;
 $lasttimestamp2 = $transitions2[$key2]['ts'];
 $check = $lasttimestamp2 <= $lasttimestamp;
 if($check) {
 $lasttimestamp2 = 4160077200;
 $timezone_test = timezone_open('Europe/Paris');
 $transitions3 = timezone_transitions_get($timezone_test, $lasttimestamp2);
 $offset1 = $transitions3[0]['offset'];
 if(7200 == $offset1) {
 $key3 = $key2 - 1;
 $key4 = 0;
 if($key2 > 0) {
 $key4 = 1;
 } else {
 $key3 = 0;
 }
 $arr = explode('T', $transitions[0]['time']);
 $copy = $arr[0];
 $arr = explode('+', $arr[1]);
 $string = '+' . $copy . ' ' . $arr[0];
 $date2 = null;
 $date1 = null;
 unset($date2);
 unset($date1);
 $string = strtr($string, array('+-' => '-'));
 $date1 = date_create($string, $timezone_utc);
 $offset1 = $transitions[0]['offset'];
 $timestampsec = '+';
 if(0 > $offset1) {
 $timestampsec = '';
 }
 $timestampsec = $timestampsec . $offset1 . ' sec';
 $date2 = date_modify($date1, $timestampsec);
 $string = date_format($date2, 'Y-m-d H:i:s');
 $date2 = null;
 $date1 = null;
 unset($date2);
 unset($date1);
 $date1 = date_create($string, $timezone);
 $offset2 = date_format($date1, 'Z');
 $offset2 = (int) $offset2;
 if($offset1 != $offset2) {
 $key4 = $key3;
 $offset3 = $transitions2[$key2]['offset'];
 if($offset2 == $offset3) {
 $key4 = $key2;
 }
 $transitions[0]['offset'] = $transitions2[$key4]['offset'];
 $transitions[0]['isdst'] = $transitions2[$key4]['isdst'];
 $transitions[0]['abbr'] = $transitions2[$key4]['abbr'];
 }
 }
 }
 $key3 = 0;
 $key4 = 0;
 } elseif($transitions[0]['ts'] == $transitions[1]['ts']) {
 unset($transitions[1]);
 if(3 > $count) {
 $key3 = 0;
 $key4 = 0;
 } else {
 $key3 = 2;
 }
 }
 $transitiontimestamp = array($transitions[0], $key4 =>
 $transitions[$key3]);
 } else {
 //
 //$transitions2 = timezone_transitions_get($timezone);
 }
 }
 var_dump($transitiontimestamp[0]);

 ?>
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/53780#comment:12>
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