"Convert" ACF field group json dumps to php array syntax.

ACF-json to array

<?php 
$json = '[{"key":"group_5533906b7cb6f","title":"Kirja-arviot","fields":[{"key":"field_54f96fb0b6afd","label":"Kirjan nimi","name":"kirja-nimi","type":"text","instructions":"","required":0,"conditional_logic":0,"wrapper":{"width":"","class":"","id":""},"default_value":"","placeholder":"","prepend":"","append":"","formatting":"html","maxlength":"","readonly":0,"disabled":0},{"key":"field_54f97431afa89","label":"Kirjan kuva","name":"kirja-kuva","type":"image","instructions":"","required":0,"conditional_logic":0,"wrapper":{"width":"","class":"","id":""},"preview_size":"thumbnail","library":"all","return_format":"array","min_width":0,"min_height":0,"min_size":0,"max_width":0,"max_height":0,"max_size":0,"mime_types":""},{"key":"field_54f9728eb6b00","label":"Kirjan tiedot","name":"kirja-tiedot","type":"repeater","instructions":"Esimerkiksi julkaisija, kirjan kuvaus tai julkaisuvuosi.","required":0,"conditional_logic":0,"wrapper":{"width":"","class":"","id":""},"row_min":"","row_limit":"","layout":"table","button_label":"Add Row","min":0,"max":0,"sub_fields":[{"key":"field_54f972a8b6b01","label":"Tieto","name":"tieto","type":"text","instructions":"","required":0,"conditional_logic":0,"wrapper":{"width":"","class":"","id":""},"default_value":"","placeholder":"","prepend":"","append":"","formatting":"html","maxlength":"","readonly":0,"disabled":0},{"key":"field_54f972ccb6b02","label":"Arvo","name":"arvo","type":"text","instructions":"","required":0,"conditional_logic":0,"wrapper":{"width":"","class":"","id":""},"default_value":"","placeholder":"","prepend":"","append":"","formatting":"html","maxlength":"","readonly":0,"disabled":0}]}],"location":[[{"param":"post_format","operator":"==","value":"aside"}]],"menu_order":0,"position":"normal","style":"seamless","label_placement":"top","instruction_placement":"label","hide_on_screen":[],"active":1,"description":""}]';

$json = json_decode($json);
$json = $json[0];

//var_dump($json->fields);
foreach($json->fields as $field){

    $acf_key = null;
    foreach($field as $key => $value){
        $label = null;

        if($key == "label"){
            $label = $value;
        }

        if($key == "key"){
            $acf_key = $value;
        }


        if(!is_null($acf_key) && !is_null($label)){
            echo "'$label' => '$acf_key',\n";
        }
    }
}