3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = ["090002" => 1460534335,"090001" => 1460534335]; var_dump(json_encode($a));
Output for 5.5.0 - 7.2.6
string(41) "{"090002":1460534335,"090001":1460534335}"