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<?php $day = 1; $month= 1; $year = 2019; $sqlData=$day . "." . $month . "." . $year; echo $sqlData; $local=new datetime($sqlData); Var_dump($local);
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
1.1.2019object(DateTime)#1 (3) { ["date"]=> string(26) "2019-01-01 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" }

preferences:
103.53 ms | 1853 KiB | 4 Q