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<?php $arr = [5,6,7]; $obj = (object)$arr; var_dump($obj);
Output for 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
object(stdClass)#1 (3) { ["0"]=> int(5) ["1"]=> int(6) ["2"]=> int(7) }
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
object(stdClass)#1 (3) { [0]=> int(5) [1]=> int(6) [2]=> int(7) }

preferences:
252.08 ms | 402 KiB | 287 Q