Podio - Multidimensional Arrays json -


can please tell me how access config:unique value in below json? can't seem multidimensional array. i'm using php

"fields": [     {       "status": "active",       "type": "text",       "field_id": 148218251,       "label": "artist name",       "values": [         {           "value": "schema_artist"         }       ],       "config": {         "default_value": null,         "unique": false,         "description": null,         "hidden_create_view_edit": false,         "required": false,         "mapping": null,         "label": "artist name",         "visible": true,         "delta": 0,         "hidden": false,         "settings": {           "format": "plain",           "size": "small"         }       },       "external_id": "artist-name"     },


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