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<?php $d1 = Datetime::createFromFormat("Y-m-d", "2017-07-29"); $tmp = clone $d1; var_dump($tmp->format('D'));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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 - 8.3.7
string(3) "Sat"
preferences:
196.51 ms | 403 KiB | 174 Q