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<?php $pos = strpos('PHP 5.6.10', phpversion()); if($pos !== false){ print "<pre>"; $arr = timezone_abbreviations_list(); print_r($arr['cit']); die; } ?>
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0, 5.6.2 - 5.6.9, 5.6.11 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.26, 7.3.0 - 7.3.13, 7.4.0 - 7.4.1
Output for 5.6.10
<pre> Notice: Undefined index: cit in /in/EsHkD on line 8
Output for 5.6.1
<pre>Array ( [0] => Array ( [dst] => [offset] => 28800 [timezone_id] => Asia/Dili ) [1] => Array ( [dst] => [offset] => 28800 [timezone_id] => Asia/Makassar ) [2] => Array ( [dst] => [offset] => 28800 [timezone_id] => Asia/Pontianak ) [3] => Array ( [dst] => [offset] => 28800 [timezone_id] => Asia/Ujung_Pandang ) )

preferences:
160.36 ms | 402 KiB | 242 Q