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<?php $a = []; $a[1] = 1; $a["1"] = 2; var_dump($a); $obj = new stdClass; $obj->{1} = 1; $obj->{"1"} = 2; var_dump($obj); $a2 = (array)$obj; var_dump($a2);
Output for 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 - 8.2.19, 8.3.0 - 8.3.7
array(1) { [1]=> int(2) } object(stdClass)#1 (1) { ["1"]=> int(2) } array(1) { [1]=> int(2) }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
array(1) { [1]=> int(2) } object(stdClass)#1 (1) { ["1"]=> int(2) } array(1) { ["1"]=> int(2) }

preferences:
174.5 ms | 402 KiB | 185 Q