3v4l.org

run code in 500+ PHP versions simultaneously
<?php class strcls implements Stringable { public function __toString() { return '{"a": 1}'; } } var_dump(json_decode(new strcls(), true));
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
array(1) { ["a"]=> int(1) }
preferences:
67.66 ms | 1140 KiB | 4 Q