3v4l.org

run code in 300+ PHP versions simultaneously
<?php $o = new stdClass; $o->aaa = 1; $o->bbb = false; $a = [$o]; var_dump(json_encode($a));
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(23) "[{"aaa":1,"bbb":false}]"
preferences:
98.09 ms | 402 KiB | 121 Q