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<?php
    session_start();

    $client_id = "mMt2llKaVO0qNS6SW0cm"; // 네이버 개발자센터에서 발급받은 CLIENT ID
    $client_secret = "rTLSOqN91F";// 네이버 개발자센터에서 발급받은 CLIENT SECRET
    $code = "1";
    $key = $_SESSION['CAPTCHA_KEY'];
    $value = $_POST['naver_captcha'];
    $url = "https://openapi.naver.com/v1/captcha/nkey?code=".$code."&key=".$key."&value=".$value;
    $is_post = false;
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_POST, $is_post);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $headers = array();
    $headers[] = "X-Naver-Client-Id: ".$client_id;
    $headers[] = "X-Naver-Client-Secret: ".$client_secret;
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    $response = curl_exec ($ch);
    $status_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close ($ch);
    //echo $status_code;
    if($status_code == 200) {
        $json = json_decode($response);
        if($json->result=="true"){
            $responseKeys["success"] = 1;
        } else {
            $responseKeys["success"] = 0;
        }
    } else {
        echo "Error 내용:".$response;
        $responseKeys["success"] = 0;
    }
    echo $_SESSION['CAPTCHA_KEY']." / ".$_POST['naver_captcha']." / ".$responseKeys["success"];
?>