3v4l.org

run code in 300+ PHP versions simultaneously
<?php $obj = new stdClass; $obj->{'123'} = "foo"; $arr = (array) $obj; print_r($arr); echo $arr['123']; // PHP4 only: "foo"
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 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
Array ( [123] => foo ) foo
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25
Array ( [123] => foo ) Notice: Undefined offset: 123 in /in/p9A5a on line 6
Output for 5.3.0 - 5.3.29
Array ( [123] => foo ) Notice: Undefined index: 123 in /in/p9A5a on line 6
Output for 5.0.0 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0 - 5.2.17
Array ( [123] => foo ) Notice: Undefined index: 123 in /in/p9A5a on line 6
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/p9A5a on line 6
Process exited with code 255.
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258.37 ms | 401 KiB | 328 Q