note 125569 added to function.date-sun-info

The relation between timestamp and geoposition is not good defined. My try of a definition is: date_sun_info — Returns an array with information about sunset/sunrise and twilight begin/end as Unix-Timestamp for the the geoposition, which must have the same (local) date as the timestamp in the parameter-block for the function date_sun_info. <?php <?php $tStamp = strtotime('2020-12-04'); $latitude = 50; echo("\n"); foreach([-181,-180,0,180,360] as $longitude ) { foreach([-86401,-86400,-86399, -1,0,1,86399, 86400,86401] as $variTimeStamp) { $sunInfoList = date_sun_info(($tStamp-$variTimeStamp),$latitude, $longitude); $sunrise = new DateTime('@'.$sunInfoList['sunrise']); echo($sunInfoList['sunrise']. ' => '.$sunrise->format('H:i:s d.m.Y').' || [ '.$variTimeStamp.' // ' . $longitude.'° ]'); echo("\n"); } echo("\n"); } ?> You may recognize the equivalence of [ 0 // 360° ] and [ 86400 // 0° ] in the results. The result is: <?php /** 1607197612 => 19:46:52 05.12.2020 || [ -86401 // -181° ] 1607197612 => 19:46:52 05.12.2020 || [ -86400 // -181° ] 1607111141 => 19:45:41 04.12.2020 || [ -86399 // -181° ] 1607111141 => 19:45:41 04.12.2020 || [ -1 // -181° ] 1607111141 => 19:45:41 04.12.2020 || [ 0 // -181° ] 1607024668 => 19:44:28 03.12.2020 || [ 1 // -181° ] 1607024668 => 19:44:28 03.12.2020 || [ 86399 // -181° ] 1607024668 => 19:44:28 03.12.2020 || [ 86400 // -181° ] 1606938194 => 19:43:14 02.12.2020 || [ 86401 // -181° ] 1607197372 => 19:42:52 05.12.2020 || [ -86401 // -180° ] 1607197372 => 19:42:52 05.12.2020 || [ -86400 // -180° ] 1607110901 => 19:41:41 04.12.2020 || [ -86399 // -180° ] 1607110901 => 19:41:41 04.12.2020 || [ -1 // -180° ] 1607110901 => 19:41:41 04.12.2020 || [ 0 // -180° ] 1607024428 => 19:40:28 03.12.2020 || [ 1 // -180° ] 1607024428 => 19:40:28 03.12.2020 || [ 86399 // -180° ] 1607024428 => 19:40:28 03.12.2020 || [ 86400 // -180° ] 1606937953 => 19:39:13 02.12.2020 || [ 86401 // -180° ] 1607154137 => 07:42:17 05.12.2020 || [ -86401 // 0° ] 1607154137 => 07:42:17 05.12.2020 || [ -86400 // 0° ] 1607067665 => 07:41:05 04.12.2020 || [ -86399 // 0° ] 1607067665 => 07:41:05 04.12.2020 || [ -1 // 0° ] 1607067665 => 07:41:05 04.12.2020 || [ 0 // 0° ] 1606981191 => 07:39:51 03.12.2020 || [ 1 // 0° ] 1606981191 => 07:39:51 03.12.2020 || [ 86399 // 0° ] 1606981191 => 07:39:51 03.12.2020 || [ 86400 // 0° ] 1606894715 => 07:38:35 02.12.2020 || [ 86401 // 0° ] 1607197301 => 19:41:41 05.12.2020 || [ -86401 // 180° ] 1607197301 => 19:41:41 05.12.2020 || [ -86400 // 180° ] 1607110828 => 19:40:28 04.12.2020 || [ -86399 // 180° ] 1607110828 => 19:40:28 04.12.2020 || [ -1 // 180° ] 1607110828 => 19:40:28 04.12.2020 || [ 0 // 180° ] 1607024353 => 19:39:13 03.12.2020 || [ 1 // 180° ] 1607024353 => 19:39:13 03.12.2020 || [ 86399 // 180° ] 1607024353 => 19:39:13 03.12.2020 || [ 86400 // 180° ] 1606937877 => 19:37:57 02.12.2020 || [ 86401 // 180° ] 1607154065 => 07:41:05 05.12.2020 || [ -86401 // 360° ] 1607154065 => 07:41:05 05.12.2020 || [ -86400 // 360° ] 1607067591 => 07:39:51 04.12.2020 || [ -86399 // 360° ] 1607067591 => 07:39:51 04.12.2020 || [ -1 // 360° ] 1607067591 => 07:39:51 04.12.2020 || [ 0 // 360° ] 1606981115 => 07:38:35 03.12.2020 || [ 1 // 360° ] 1606981115 => 07:38:35 03.12.2020 || [ 86399 // 360° ] 1606981115 => 07:38:35 03.12.2020 || [ 86400 // 360° ] 1606894638 => 07:37:18 02.12.2020 || [ 86401 // 360° ] */ ?> ---- Server IP: 45.112.84.4 Probable Submitter: 45.91.156.130 (proxied: 2003:e4:9715:dd01:bc7e:7f2f:23f4:b95) ---- Manual Page -- http://php.net/manual/en/function.date-sun-info.php Edit -- https://master.php.net/note/edit/125569 Del: integrated -- https://master.php.net/note/delete/125569/integrated Del: useless -- https://master.php.net/note/delete/125569/useless Del: bad code -- https://master.php.net/note/delete/125569/bad+code Del: spam -- https://master.php.net/note/delete/125569/spam Del: non-english -- https://master.php.net/note/delete/125569/non-english Del: in docs -- https://master.php.net/note/delete/125569/in+docs Del: other reasons-- https://master.php.net/note/delete/125569 Reject -- https://master.php.net/note/reject/125569 Search -- https://master.php.net/manage/user-notes.php