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run code in 300+ PHP versions simultaneously
<?php $x = new stdClass; $x->{42} = 1; $y = (array)$x; echo json_encode($x); echo json_encode($y); echo $y[42];
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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
{"42":1}{"42":1}1
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33
{"42":1}{"42":1} Notice: Undefined offset: 42 in /in/G0UJa on line 8

preferences:
222.45 ms | 402 KiB | 269 Q