3v4l.org

run code in 300+ PHP versions simultaneously
<?php $o = new stdClass; $o->aaa = 1; $a = [$o]; var_dump(json_encode($a));
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.26, 8.1.0 - 8.1.13, 8.2rc1 - rc3
string(11) "[{"aaa":1}]"

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32.55 ms | 409 KiB | 5 Q