- json_decode: documentation ( source)
- json_encode: documentation ( source)
<?php
$json = '{"accounts":[{"id":"1","0":"1","username":"testuser","1":"testuser","password":"testpass","2":"testpass","email":"test@user.com","3":"test@user.com","lastlogin":"2017-07-06 06:48:50","4":"2017-07-06 06:48:50"}]}';
$array = json_decode($json);
echo json_encode($array, JSON_PRETTY_PRINT);