how to group page_fan_city values by country on insights table - php

Question

first im sory my bad english
im getting page stats via graph api. (insights/page_fan_city)
my query and the facebook response is below.
{
"data": [
{
"id": "147197862002528/insights/page_fans_city/lifetime",
"name": "page_fans_city",
"period": "lifetime",
"values": [
{
"value": {
"istanbul": 20017,
"ankara": 9763,
"izmir": 7549,
"bursa": 3350,
"adana": 2949,
"antalya": 2687,
"konya": 2375,
"izmit": 2229,
"mersin": 1942,
"samsun": 1861,
"kayseri": 1444,
"maltepe": 1403,
"trabzon": 1327,
"manisa": 1163,
"eskisehir": 1040,
"baku": 1015,
"denizli": 986,
"mugla": 978,
"erzurum": 809
},
"end_time": "2011-12-17T08:00:00+0000"
}
],
"description": "Lifetime Aggregated Facebook location data, sorted by city, about the people who like your Page. (Total Count)"
}
],
"paging": {
"previous": "https://graph.facebook.com/147197862002528/insights/page_fans_city/lifetime/?access_token=HIDDEN&since=1323682381&until=1323941581",
"next": "https://graph.facebook.com/147197862002528/insights/page_fans_city/lifetime/?access_token=HIDDEN&since=1324200781&until=1324459981"
}
}
I get just this information. I want to get cities which is the country. How can i get the name of countries

Answer 1

Seems like an old question, but just to clear things up you could assign that JSON object to a string and recurse through it like so to get the countries:
$response = json_decode($json);
foreach((array)$response->data[0]->values[0]->value as $key => $val) {
print $key."\n";
}