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@ 2014-07-04T02:08:09Z

<?php

$recordings = [
    'step_1_part_1' => [ 'required' => 'true', 'format' => 'wav' ]
    ];

echo json_encode($recordings);

Output
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json_encode: documentation ( source)

preferences:dark modelive preview

46.52 ms | 402 KiB | 5 Q