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@ 2020-11-03T10:20:04Z

<?php

$fields= [
  'arr' => [ '3333']
];
echo json_encode($fields, JSON_PRETTY_PRINT);

Output
Performance
VLD
References
Branches

json_encode: documentation ( source)

preferences:dark modelive previewkey bindings

112.56 ms | 1531 KiB | 5 Q