Online PHP editor | refs for hHAbl

@ 2018-07-01T13:25:33Z

<?php

$order_info = [
    "success" => 1,
    "return" => [
        "100010973975966" => [
            "pair" => "doge_btc"
            // etc..
        ]
    ]
];

$order_id = key($order_info['return']);
echo $order_id;