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<?php $startYear = 2010; $array = []; for ($x = $startYear; $x <= date('Y'); $x ++) { $date = DateTime::createFromFormat('Y-m-d\TH:i:s', $x . '-01-01T00:00:00'); $array[$x] = $date->format('Y-m-d\TH:i:s'); } var_dump($array);
Output for 5.6.0 - 5.6.40, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
array(9) { [2010]=> string(19) "2010-01-01T00:00:00" [2011]=> string(19) "2011-01-01T00:00:00" [2012]=> string(19) "2012-01-01T00:00:00" [2013]=> string(19) "2013-01-01T00:00:00" [2014]=> string(19) "2014-01-01T00:00:00" [2015]=> string(19) "2015-01-01T00:00:00" [2016]=> string(19) "2016-01-01T00:00:00" [2017]=> string(19) "2017-01-01T00:00:00" [2018]=> string(19) "2018-01-01T00:00:00" }

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130.34 ms | 409 KiB | 5 Q