3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = json_decode('{ "key": "levels", "value": "[{role_id:1, access_level_id:3}, {role_id:2, access_level_id:1}, {role_id:3, access_level_id:2}]", "description": "" }', true); $x['value'] = json_decode(preg_replace('/(\w+)(?=:)/', '"$1"', $x['value']), true); print_r($x);
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Array ( [key] => levels [value] => Array ( [0] => Array ( [role_id] => 1 [access_level_id] => 3 ) [1] => Array ( [role_id] => 2 [access_level_id] => 1 ) [2] => Array ( [role_id] => 3 [access_level_id] => 2 ) ) [description] => )

preferences:
138.96 ms | 409 KiB | 5 Q