3v4l.org

run code in 300+ PHP versions simultaneously
<?php $someJson = '{"":""}'; $myObject = json_decode($someJson); $newJson = json_encode($myObject); var_dump($someJson, $newJson, $someJson === $newJson);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
string(7) "{"":""}" string(7) "{"":""}" bool(true)
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33
string(7) "{"":""}" string(14) "{"_empty_":""}" bool(false)

preferences:
242.09 ms | 402 KiB | 326 Q