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run code in 150+ php & hhvm versions
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<?php date_default_timezone_set('UTC'); $utc = new DateTimeZone('UTC'); $time = DateTime::createFromFormat('Y-m-d H:i:s', '2014-05-19 11:30:00', $utc); foreach (array('UTC', 'Europe/London', 'BST', 'Etc/GMT+1', 'GMT+1', 'CEST', 'EST', 'GMT-5') as $abbr) { $zone = new DateTimeZone($abbr); echo "{$abbr}: {$zone->getOffset($time)}", PHP_EOL; }
Output for 5.5.22 - 5.5.38, 5.6.6 - 7.1.0
UTC: 0 Europe/London: 3600 BST: 0 Etc/GMT+1: -3600 GMT+1: 3600 CEST: 3600 EST: -18000 GMT-5: -18000
Output for 5.5.10 - 5.5.21, 5.6.0 - 5.6.5
UTC: 0 Europe/London: 3600 BST: 3600 Etc/GMT+1: -3600 GMT+1: 3600 CEST: 3600 EST: -18000 GMT-5: -18000
Output for 5.3.0 - 5.3.2, 5.3.6 - 5.5.9
UTC: 0 Europe/London: 3600 BST: 3600 Etc/GMT+1: -3600 Fatal error: Uncaught exception 'Exception' with message 'DateTimeZone::__construct(): Unknown or bad timezone (GMT+1)' in /in/t3StK:8 Stack trace: #0 /in/t3StK(8): DateTimeZone->__construct('GMT+1') #1 {main} thrown in /in/t3StK on line 8
Process exited with code 255.
Output for 5.3.3 - 5.3.5
UTC: 0 Europe/London: 3600 BST: 3600 Etc/GMT+1: -3600 GMT+1: -3600 CEST: 7200 EST: -14400 GMT-5: 18000
Output for 5.2.10 - 5.2.17
Fatal error: Call to undefined method DateTime::createFromFormat() in /in/t3StK on line 6
Process exited with code 255.
Output for 5.2.0 - 5.2.9
Fatal error: Call to undefined method DateTime::createfromformat() in /in/t3StK on line 6
Process exited with code 255.
Output for 5.1.0 - 5.1.6
Fatal error: Class 'DateTimeZone' not found in /in/t3StK on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Fatal error: Call to undefined function date_default_timezone_set() in /in/t3StK on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '(', expecting '}' in /in/t3StK on line 9
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected '(', expecting '}' in /in/t3StK on line 9
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'}'' in /in/t3StK on line 9
Process exited with code 255.