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<?php $row['A'] = '13/03/2019'; echo date('Y-m-d', strtotime(trim(str_replace('/','-',$row['A']))));
Output for 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
2019-03-13

preferences:
148.34 ms | 407 KiB | 5 Q