diff --git a/auth/linkedin/callback.php b/auth/linkedin/callback.php
new file mode 100644
index 0000000..25999fd
--- /dev/null
+++ b/auth/linkedin/callback.php
@@ -0,0 +1,73 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2018/6/13
+ * Time: 10:50
+ */
+
+require_once "./function.php";
+
+$state = 'x1Dr3Nu0AaxM1TuLVuGwAJWM';
+
+// step 1: get access token by code
+function getAccessToken($code)
+{
+    $url = "https://www.linkedin.com/oauth/v2/accessToken";
+
+    $data = array(
+        'grant_type' => 'authorization_code',
+        'code' => $code,
+        'redirect_uri' => 'https://fengyuexingzi.top/auth/linkedin',
+        'client_id' => '81cc4t9fuu9bpu',
+        'client_secret' => 'GdY3ZO8LAHn8y4tX',
+    );
+
+    $ch = curl_init($url);
+    curl_setopt($ch, CURLOPT_POST, true);
+    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
+    curl_setopt($ch, CURLOPT_TRANSFERTEXT, true);
+    curl_setopt($ch, CURLOPT_TIMEOUT, 5);
+    curl_setopt($ch, CURLOPT_HEADER, false);
+    $result = curl_exec($ch);
+    $info = curl_getinfo($ch);
+    curl_close($ch);
+
+    $result = json_decode($result, true);
+    if (isset($result['access_token'])) {
+
+    }
+}
+
+// step 2: get user info by access token
+function getInfo($url, $access_token)
+{
+    // 1. 判断 AccessToken 状态（过期，即将过期，正常，无效）
+    // 2.AccessToken 1）无效或过期，回到 step 1 重新请求; 2）即将过期， 调用刷新接口；3）正常使用
+
+    $data = [
+        'access_token' => "AQXMRNlQv7rqemb6KmBKMWurtL7I6KV381MUxXQIeW6YszIueblWCVatVrVACzO-L2wWI7VSgto_hvH_ET1E7aVUjAalRXvcEu4qsWx57YS1yVANEbpez3dQUupIRrqGOGnokRHR64nQyVFqTPaS9e2hPvO_miOtlBD3mzQjxLC1O2xxJrG4BIWohlNmMyxgvVXM2OZCurPG5rFyfoitB-rmI6JyvW4tUYRFoJLe5XzjfpUWoe0OUzWxo8y67xrY4tIBAILKGnMM2KDfHKyVJx9JDoVC7jCPHaWC9mSEWSSlunC5Q_xJuJb98MPwDUlrtXkvpJSC9yzbsODR_nnBr5coHEcIlA",
+
+    ];
+
+    $info_url = "https://api.linkedin.com/v1/people/~?format=json";
+
+    $ch = curl_init($url);
+    curl_setopt($ch, CURLOPT_HTTPHEADER, [
+        'Authorization: ' . $access_token,
+    ]);
+    curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
+    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+    curl_setopt($ch, CURLOPT_TIMEOUT, 5);
+    curl_setopt($ch, CURLOPT_HEADER, true);
+    $result = curl_exec($ch);
+    $info = curl_getinfo($ch);
+    $info['result'] = $result;
+    curl_close($ch);
+
+    return $info;
+}
+
+//$access_token = getAccessToken($_GET['code']);
+
+print_r($GLOBALS);
\ No newline at end of file
diff --git a/auth/linkedin/function.php b/auth/linkedin/function.php
new file mode 100644
index 0000000..f5070ab
--- /dev/null
+++ b/auth/linkedin/function.php
@@ -0,0 +1,23 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2018/6/13
+ * Time: 10:51
+ */
+
+register_shutdown_function('shutdown');
+
+function shutdown()
+{
+    echo '<pre>';
+    print_r(error_get_last());
+    echo '</pre>';
+}
+
+function dump($data)
+{
+    echo '<pre>';
+    print_r($data);
+    echo '</pre>';
+}
diff --git a/auth/linkedin/index.php b/auth/linkedin/index.php
index 56bbc10..62ccf53 100644
--- a/auth/linkedin/index.php
+++ b/auth/linkedin/index.php
@@ -6,77 +6,35 @@
  * Time: 15:17
  */
 
-$code_url = "https://www.linkedin.com/oauth/v2/authorization?response_type=code&client_id=81cc4t9fuu9bpu&redirect_uri=https%3A%2F%2Ffengyuexingzi.top%2Fauth%2Flinkedin&state=987654321&scope=r_basicprofile";
+require_once"./function.php";
 
-$data = [
-    'access_token' => "AQXMRNlQv7rqemb6KmBKMWurtL7I6KV381MUxXQIeW6YszIueblWCVatVrVACzO-L2wWI7VSgto_hvH_ET1E7aVUjAalRXvcEu4qsWx57YS1yVANEbpez3dQUupIRrqGOGnokRHR64nQyVFqTPaS9e2hPvO_miOtlBD3mzQjxLC1O2xxJrG4BIWohlNmMyxgvVXM2OZCurPG5rFyfoitB-rmI6JyvW4tUYRFoJLe5XzjfpUWoe0OUzWxo8y67xrY4tIBAILKGnMM2KDfHKyVJx9JDoVC7jCPHaWC9mSEWSSlunC5Q_xJuJb98MPwDUlrtXkvpJSC9yzbsODR_nnBr5coHEcIlA",
+// get_code_url = "https://www.linkedin.com/oauth/v2/authorization?response_type=code&client_id=81cc4t9fuu9bpu&redirect_uri=https%3A%2F%2Ffengyuexingzi.top%2Fauth%2Flinkedin&state=Wf6tYXQ7y86iRulBOC%2FUXraHneM%3D&scope=r_fullprofile%20r_emailaddress%20w_share";
 
-];
+// $state = base64_encode(openssl_random_pseudo_bytes(20));
+$state = 'x1Dr3Nu0AaxM1TuLVuGwAJWM';
 
-$info_url = "https://api.linkedin.com/v1/people/~?format=json";
-
-register_shutdown_function('shutdown');
-
-function shutdown()
-{
-    echo '<pre>';
-    print_r(error_get_last());
-    echo '</pre>';
-    die('shutdown');
-}
-
-function dump($data)
-{
-    echo '<pre>';
-    print_r($data);
-    echo '</pre>';
-}
-
-function curl_get($url, $data)
+function getCodeUrl()
 {
-    $ch = curl_init($url);
-    curl_setopt($ch, CURLOPT_HTTPHEADER, [
-        'Authorization: ' . $data['access_token'],
-    ]);
-    curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
-    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-    curl_setopt($ch, CURLOPT_TIMEOUT, 5);
-    curl_setopt($ch, CURLOPT_HEADER, true);
-    $result = curl_exec($ch);
-    $info = curl_getinfo($ch);
-    $info['result'] = $result;
-    curl_close($ch);
-
-    return $info;
+    $url = 'https://www.linkedin.com/oauth/v2/authorization';
+    $data = array(
+        'response_type' => 'code',
+        'client_id' => '81cc4t9fuu9bpu',
+        'redirect_uri' => 'https://fengyuexingzi.top/auth/linkedin',
+        'state' => $GLOBALS['state'],
+        'scope' => 'r_fullprofile r_emailaddress w_share',
+    );
+    foreach ($data as $k => $v) {
+        if (!$v) {
+            return false;
+        }
+    }
+    $url .= http_build_query($data, null, '&', PHP_QUERY_RFC3986);
+
+    return $url;
 }
 
-$result = curl_get($info_url, $data);
-
-dump($result);
-
-die;
-
-$url = "https://www.linkedin.com/oauth/v2/accessToken";
+$url = getCodeUrl();
 
-$data = array(
-    'grant_type' => 'authorization_code',
-    'code' => $_GET['code'],
-    'redirect_uri' => 'https://fengyuexingzi.top/auth/linkedin',
-    'client_id' => '81cc4t9fuu9bpu',
-    'client_secret' => 'GdY3ZO8LAHn8y4tX',
-);
-
-$ch = curl_init($url);
-curl_setopt($ch, CURLOPT_POST, true);
-curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
-curl_setopt($ch, CURLOPT_TRANSFERTEXT, true);
-curl_setopt($ch, CURLOPT_TIMEOUT, 5);
-curl_setopt($ch, CURLOPT_HEADER, false);
-$result = curl_exec($ch);
-$info = curl_getinfo($ch);
-curl_close($ch);
-
-$result = json_decode($result, true);
-if (isset($result['access_token'])) {
-
-}
+$html = <<<EOF
+<a href="${url}">获取授权</a>
+EOF;