$url = "http://dapi.kakao.com/v2/local/search/address.json?query=".urlencode("주소");

$headers = array('Authorization: KakaoAK {REST_API_KEY}');

$curl = curl_init();

curl_setopt($curl, CURLOPT_URL, $url);

curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);

curl_setopt($curl, CURLOPT_HEADER, 0);

curl_setopt($curl, CURLOPT_HTTPGET, true);

curl_setopt($curl, CURLOPT_POST, false);

curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

$return_data = curl_exec($curl);

curl_close($curl);

$return_address = json_decode($return_data,TRUE);

----------

Array (

 [documents] => Array (

  [0] => Array (

   [address] => Array (

    [address_name] =>

    [b_code] =>

    [h_code] =>

    .

    .

    .

    [x] =>

    [y] =>

   )

   .

   .

   .

   [road_address] => Array (  

    .

    .

    .

   )

   [x] =>

   [y] =>

   )

 )

 [meta] => Array (

  .

  .

  .

 )

)