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run code in 150+ php & hhvm versions
Bugs & Features
<?php $date = '2015-01-01T00:00:00.000Z'; echo "DateTimeZone will be ignored because date has a timezone 'Z'\n"; $dateTime = new DateTime($date, new DateTimeZone('America/Mexico_City')); echo $dateTime->format('c'). "\n\n"; echo "DateTimeZone will be ignored, date timezone is in UTC anyway!\n"; $dateTime = new DateTime($date, new DateTimeZone('UTC')); echo $dateTime->format('c'). "\n\n"; $date = '2015-01-01T00:00:00.000'; echo "Timezone will be set to the given DateTimeZone America/Mexico_City\n"; $dateTime = new DateTime($date, new DateTimeZone('America/Mexico_City')); echo $dateTime->format('c'). "\n\n"; echo "Timezone will be set to the given DateTimeZone UTC\n"; $dateTime = new DateTime($date, new DateTimeZone('UTC')); echo $dateTime->format('c'). "\n\n"; echo "Timezone will set to the given timezone set in the date string America/Mexico_City\n"; $date = '2015-01-01T00:00:00.000 America/Mexico_City'; $dateTime = new DateTime($date); echo $dateTime->format('c'). "\n\n";
based on 0dTRW
Output for 5.2.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
DateTimeZone will be ignored because date has a timezone 'Z' 2015-01-01T00:00:00+00:00 DateTimeZone will be ignored, date timezone is in UTC anyway! 2015-01-01T00:00:00+00:00 Timezone will be set to the given DateTimeZone America/Mexico_City 2015-01-01T00:00:00-06:00 Timezone will be set to the given DateTimeZone UTC 2015-01-01T00:00:00+00:00 Timezone will set to the given timezone set in the date string America/Mexico_City 2015-01-01T00:00:00-06:00
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.0 - 5.1.6
DateTimeZone will be ignored because date has a timezone 'Z' Fatal error: Class 'DateTime' not found in /in/ktb3U on line 5
Process exited with code 255.
Output for 4.3.2 - 4.4.9
DateTimeZone will be ignored because date has a timezone 'Z' Fatal error: Cannot instantiate non-existent class: datetime in /in/ktb3U on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1
DateTimeZone will be ignored because date has a timezone 'Z' Fatal error: Cannot instantiate non-existent class: datetime in /in/ktb3U on line 5