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<?php $tzIdentifiers = \DateTimeZone::listIdentifiers(\DateTimeZone::ALL_WITH_BC); foreach ($tzIdentifiers as $tzid) { try { $tz = new \DateTimeZone($tzid); } catch(\Exception $e) { echo $tzid . ' returned by \\DateTimeZone::listIdentifiers(\DateTimeZone::ALL_WITH_BC).' . '\n'; echo 'But invalid for: new \DateTimeZone(' . $tzid . ')' . '\n'; } }
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