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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 (['BST', 'GMT+1', 'CEST'] as $abbr) { $seconds = (new DateTimeZone($abbr))->getOffset($time); $local = clone $time; $time->modify("+{$seconds} seconds"); echo "{$abbr}: {$local->format(DATE_RFC822)}", PHP_EOL; }
Output for 5.5.22 - 5.5.38, 5.6.6 - 5.6.28, 7.0.0 - 7.1.0
BST: Mon, 19 May 14 11:30:00 +0000 GMT+1: Mon, 19 May 14 11:30:00 +0000 CEST: Mon, 19 May 14 12:30:00 +0000
Output for hhvm-3.10.0 - 3.12.0
BST: Mon, 19 May 14 11:30:00 +0000 Fatal error: Uncaught exception 'Exception' with message 'DateTimeZone::__construct(): Unknown or bad timezone (GMT+1)' in /in/kWMdh:8 Stack trace: #0 /in/kWMdh(8): DateTimeZone->__construct() #1 {main}
Process exited with code 255.
Output for 5.5.10 - 5.5.21, 5.6.0 - 5.6.5
BST: Mon, 19 May 14 11:30:00 +0000 GMT+1: Mon, 19 May 14 12:30:00 +0000 CEST: Mon, 19 May 14 13:30:00 +0000
Output for 5.4.0 - 5.5.9
BST: Mon, 19 May 14 11:30:00 +0000 Fatal error: Uncaught exception 'Exception' with message 'DateTimeZone::__construct(): Unknown or bad timezone (GMT+1)' in /in/kWMdh:8 Stack trace: #0 /in/kWMdh(8): DateTimeZone->__construct('GMT+1') #1 {main} thrown in /in/kWMdh on line 8
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/kWMdh on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/kWMdh on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/kWMdh on line 7
Process exited with code 255.