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<?php foreach(array("Asia/Novosibirsk", "Asia/Novosibirsk") as $tz) {echo $tz,"=", (int)in_array($tz, timezone_identifiers_list()), "\n";}
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Asia/Novosibirsk=1 Asia/Novosibirsk=1
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Asia/Novosibirsk= Fatal error: Call to undefined function timezone_identifiers_list() in /in/jZL7f on line 2
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Asia/Novosibirsk= Fatal error: Call to undefined function: timezone_identifiers_list() in /in/jZL7f on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
Asia/Novosibirsk= Fatal error: Call to undefined function: timezone_identifiers_list() in /in/jZL7f on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Asia/Novosibirsk= Fatal error: Call to undefined function: timezone_identifiers_list() in /in/jZL7f on line 2

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