Converter Latitude e Longitude em Endereço

Olá,

Tenho um banco de dados onde temos vários eventos e suas localizações em longitude e latitude, porém preciso converter em endereço.

Consegui um código mas ele não funciona, vocês poderiam me ajudar?

$lat = '-18.8786';
$lon = '-48.3000';

function Get_Address_From_Google_Maps($lat, $lon) {

$url = "https://maps.googleapis.com/maps/api/geocode/json?latlng=$lat,$lon&key=<AQUI ESTÁ MINHA API KEY>";

// Make the HTTP request
$data = @file_get_contents($url);
// Parse the json response

$jsondata = json_decode($data,true);

// If the json data is invalid, return empty array
if (!check_status($jsondata)) return array();

$address = array(

 'country' => google_getCountry($jsondata),
 'province' => google_getProvince($jsondata),
 'city' => google_getCity($jsondata),
 'street' => google_getStreet($jsondata),
 'postal_code' => google_getPostalCode($jsondata),
 'country_code' => google_getCountryCode($jsondata),
 'formatted_address' => google_getAddress($jsondata),
);

return $address;
}

/*
* Check if the json data from Google Geo is valid
*/

function check_status($jsondata) {
 if ($jsondata["status"] == "OK") return true;
 return false;
}

/*
* Given Google Geocode json, return the value in the specified element of the array
*/

function google_getCountry($jsondata) {
 return Find_Long_Name_Given_Type("country", $jsondata["results"][0]["address_components"]);
}
function google_getProvince($jsondata) {
 return Find_Long_Name_Given_Type("administrative_area_level_1", $jsondata["results"][0]["address_components"], true);
}
function google_getCity($jsondata) {
 return Find_Long_Name_Given_Type("locality", $jsondata["results"][0]["address_components"]);
}
function google_getStreet($jsondata) {
 return Find_Long_Name_Given_Type("street_number", $jsondata["results"][0]["address_components"]) . ' ' . Find_Long_Name_Given_Type("route", $jsondata["results"][0]["address_components"]);
}
function google_getPostalCode($jsondata) {
 return Find_Long_Name_Given_Type("postal_code", $jsondata["results"][0]["address_components"]);
}
function google_getCountryCode($jsondata) {
 return Find_Long_Name_Given_Type("country", $jsondata["results"][0]["address_components"], true);
}
function google_getAddress($jsondata) {
 return $jsondata["results"][0]["formatted_address"];
}

/*

* Searching in Google Geo json, return the long name given the type.
* (If short_name is true, return short name)

function Find_Long_Name_Given_Type($type, $array, $short_name = false) {
 foreach( $array as $value) {
 if (in_array($type, $value["types"])) {
 if ($short_name)
 return $value["short_name"];
 return $value["long_name"];
 }
 }
}

/*
* Print an array
*/

function d($a) {
 echo "<pre>";
 print_r($a);
 echo "</pre>";
}