Online PHP editor | output for b59mF

<?php $json = '{"members":{"oXawwwTFj0TPBnyPNSONhBSm3KuU":{"openid":"oXawwwTFj0TPBnyPNSONhBSm3KuU","nickname":"\\u4e0d\\u77e5\\u9053","order":1,"gz_id":"gh_c536632f9b83","identify":0,"word":"galaxy s4"},"oXawwwfAK-VuURbNiS6N8Ub-5oTs":{"openid":"oXawwwfAK-VuURbNiS6N8Ub-5oTs","nickname":"yi","gz_id":"gh_c536632f9b83","order":2,"identify":1,"word":"galaxy s3"},"oXawwwUAYrxRj5k2yf6MgEH13H1k":{"openid":"oXawwwUAYrxRj5k2yf6MgEH13H1k","nickname":"\\u6b63\\u5728\\u8f93\\u5165..","gz_id":"gh_c536632f9b83","order":3,"identify":0,"word":"galaxy s4"}},"words":{"commoner":"galaxy s4","spy":"galaxy s3"},"owner_id":"oXawwwTFj0TPBnyPNSONhBSm3KuU","total_num":3,"commoner_num":2,"spy_num":1,"room_no":45315,"create_time":1466762642,"status":1,"users":{"1":"oXawwwTFj0TPBnyPNSONhBSm3KuU","2":"oXawwwfAK-VuURbNiS6N8Ub-5oTs","3":"oXawwwUAYrxRj5k2yf6MgEH13H1k"},"punishes":{"oXawwwTFj0TPBnyPNSONhBSm3KuU":"5","oXawwwUAYrxRj5k2yf6MgEH13H1k":"5","oXawwwfAK-VuURbNiS6N8Ub-5oTs":"5"},"punish":{"5":3},"punish_id":3,"commoners":["oXawwwTFj0TPBnyPNSONhBSm3KuU","oXawwwUAYrxRj5k2yf6MgEH13H1k"],"spies":["oXawwwfAK-VuURbNiS6N8Ub-5oTs"],"round_num":1,"rounds":{"1":{"users":{"1":"oXawwwTFj0TPBnyPNSONhBSm3KuU","2":"oXawwwfAK-VuURbNiS6N8Ub-5oTs","3":"oXawwwUAYrxRj5k2yf6MgEH13H1k"},"describe":{"oXawwwTFj0TPBnyPNSONhBSm3KuU":"\\u4e09\\u661f\\u624b\\u673a"}}}}'; $room = json_decode($json, true); $next_user_order =2 ; echo $room['members'][$room['users'][$next_user_order]]['nickname'];