add todo for oauth, support multiple api key

samples/client/petstore/php/SwaggerClient-php/lib/APIClient.php

@@ -68,6 +68,8 @@ class APIClient {
   }
 
   /**
+   * update hearder and query param based on authentication setting
+   * 
    * @param array $headerParams
    * @param array $queryParams
    * @param array $authSettings
@@ -79,16 +81,22 @@ class APIClient {
 
     // one endpoint can have more than 1 auth settings
     foreach($authSettings as $auth) {
-      // determine which auth scheme  to use
+      // determine which one to use
       switch($auth) {
         
         case 'api_key':
-           $headerParams['api_key'] = Configuration::$api_key;
+           $headerParams['api_key'] = Configuration::$apiKey['api_key'];
+           
+           break;
+        
+        case 'api_secret':
+           $queryParams['api_secret'] = Configuration::$apiKey['api_secret'];
            
            break;
         
         case 'petstore_auth':
            
+           #TODO support oauth
            break;
         
       }

samples/client/petstore/php/SwaggerClient-php/lib/Configuration.php

@@ -0,0 +1,36 @@
+<?php
+/**
+ *  Copyright 2015 Reverb Technologies, Inc.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+namespace SwaggerClient;
+
+class Configuration {
+
+  public static $PATCH = "PATCH";
+  public static $POST = "POST";
+  public static $GET = "GET";
+  public static $PUT = "PUT";
+  public static $DELETE = "DELETE";
+
+  // authentication setting
+  public static $apiKey = array();
+  public static $apiKeyPrefix = array();
+  public static $username = '';
+  public static $password = '';
+
+
+}
+

samples/client/petstore/php/SwaggerClient-php/lib/StoreApi.php

@@ -69,7 +69,7 @@ class StoreApi {
       }
 
       // authentication setting, if any
-      $authSettings = array('api_key');
+      $authSettings = array('api_key', 'api_secret');
 
       // make the API Call
       $response = $this->apiClient->callAPI($resourcePath, $method,