Update client.md

docs/src/4.x/client.md

@@ -3,10 +3,10 @@
 该方法将 API 交由开发者自行调用，微信有部分新的接口4.x并未全部兼容支持,可以使用该方案去自行封装接口：
 
 例如URL Link接口
+
 ```php
-$api = $app->getClient();
 
-$response = $api->httpPostJson('wxa/generate_urllink',[
+$response = $app->httpPostJson('wxa/generate_urllink',[
     'path' => 'pages/index/index',
     'is_expire' => true,
     'expire_type' => 1,
@@ -26,15 +26,15 @@ httpPostJson(string $uri, array $data = [], array $query = [])
 ### GET
 
 ```php
-$response = $api->httpGet('/cgi-bin/user/list', [
+$response = $app->httpGet('/cgi-bin/user/list', [
     'next_openid' => 'OPENID1',
 ]);
 ```
 
 ### POST
 
 ```php
-$response = $api->httpPostJson('/cgi-bin/user/info/updateremark', [
+$response = $app->httpPostJson('/cgi-bin/user/info/updateremark', [
     "openid" => "oDF3iY9ffA-hqb2vVvbr7qxf6A0Q",
     "remark" => "pangzi"
 ]);