Finding State Short Name from JSON file with PHP - php

Question

I have a JSON file that have all list of all the countries with their cities, and state. The file has this structure
"NO": {
"name": "Norway",
"states": {
"VA": {
"name": "Vest-Agder"
},
"RO": {
"name": "Rogaland"
},
"HO": {
"name": "Hordaland"
},
"SF": {
"name": "Sogn og Fjordane"
},
"MR": {
"name": "Møre og Romsdal"
},
"ST": {
"name": "Sør-Trøndelag"
},
"NO": {
"name": "Nord-Trøndelag"
},
"NT": {
"name": "Nordland"
},
"TR": {
"name": "Troms"
},
"FI": {
"name": "Finnmark"
},
"SJ": {
"name": "Svalbard"
},
"SJ": {
"name": "Jan Mayen"
},
"AK": {
"name": "Akershus"
},
"AA": {
"name": "Aust-Agder"
},
"BU": {
"name": "Buskerud"
},
"HE": {
"name": "Hedmark"
},
"OP": {
"name": "Oppland"
},
"OS": {
"name": "Oslo"
},
"TE": {
"name": "Telemark"
},
"VF": {
"name": "Vestfold"
},
"OF": {
"name": "Østfold"
}
}
},
What I am trying to achieve is to get the short name of state when user input the full name in the input field. For example if they add "Oslo" I will get "OS" in output
This is the code that I came up with but I am not getting the output.
$jsonitem = file_get_contents("countries-info.json");
$objitems = json_decode($jsonitem);
$findByname = function($name) use ($objitems) {
foreach ($objitems as $friend) {
if ($friend->name == $name) return $friend->state;
}
return false;
};
echo $findByname($_GET[code]) ?: 'No record found.';
Need advise.

Answer 1

Looking at the structure of your JSON you should loop $objitems->NO->states ( $objitems will contain the complete object, you only want the states)
So you need to change your foreach to:
foreach ($objitems->NO->states as $short => $state) {
if ($state->name == $name) return $short;
}

Answer 2

foreach ($objitems as $state => $friend) {
if ($friend->name == $name) return $state;
}