3v4l.org

run code in 500+ PHP versions simultaneously
<?php $data = [ "cats" => [ "cory" => [ "color" => "red", "age" => 5, "has_family" => true ], "trevor" => [ "color" => "brown", "age" => 3, "has_family" => false ] ] ]; echo json_encode($data);
Output for 7.0.0 - 7.0.25, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.33, 8.4.1 - 8.4.24, 8.5.0 - 8.5.9
{"cats":{"cory":{"color":"red","age":5,"has_family":true},"trevor":{"color":"brown","age":3,"has_family":false}}}
preferences:
112.68 ms | 1547 KiB | 4 Q