Accept arrays as arguments to collection parameters.

Author: arnested

modules/swagger-codegen/src/main/resources/php/ObjectSerializer.mustache

@@ -161,6 +161,39 @@ class ObjectSerializer
         }
     }
 
+    /**
+     * Serialize an array to a string.
+     *
+     * @param array  $collection       collection to serialize to a string
+     * @param string $collectionFormat the format use for serialization (csv,
+     * ssv, tsv, pipes, multi)
+     *
+     * @return string
+     */
+    public function serializeCollection(array $collection, $collectionFormat, $allowCollectionFormatMulti=false)
+    {
+        if ($allowCollectionFormatMulti && ('multi' === $collectionFormat)) {
+            // http_build_query() almost does the job for us. We just
+            // need to fix the result of multidimensional arrays.
+            return preg_replace('/%5B[0-9]+%5D=/', '=', http_build_query($collection, '', '&'));
+        }
+        switch ($collectionFormat) {
+            case 'pipes':
+                return implode('|', $collection);
+
+            case 'tsv':
+                return implode("\t", $collection);
+
+            case 'ssv':
+                return implode(' ', $collection);
+
+            case 'csv':
+                // Deliberate fall through. CSV is default format.
+            default:
+                return implode(',', $collection);
+        }
+    }
+
     /**
      * Deserialize a JSON string into an object
      *

modules/swagger-codegen/src/main/resources/php/api.mustache

@@ -139,14 +139,29 @@ use \{{invokerPackage}}\ObjectSerializer;
         $headerParams['Content-Type'] = ApiClient::selectHeaderContentType(array({{#consumes}}'{{mediaType}}'{{#hasMore}},{{/hasMore}}{{/consumes}}));
 
         {{#queryParams}}// query params
+        {{#collectionFormat}}
+        if (is_array(${{paramName}})) {
+            ${{paramName}} = $this->apiClient->getSerializer()->serializeCollection(${{paramName}}, '{{collectionFormat}}', true);
+        }
+        {{/collectionFormat}}
         if (${{paramName}} !== null) {
             $queryParams['{{baseName}}'] = $this->apiClient->getSerializer()->toQueryValue(${{paramName}});
         }{{/queryParams}}
         {{#headerParams}}// header params
+        {{#collectionFormat}}
+        if (is_array(${{paramName}})) {
+            ${{paramName}} = $this->apiClient->getSerializer()->serializeCollection(${{paramName}}, '{{collectionFormat}}');
+        }
+        {{/collectionFormat}}
         if (${{paramName}} !== null) {
             $headerParams['{{baseName}}'] = $this->apiClient->getSerializer()->toHeaderValue(${{paramName}});
         }{{/headerParams}}
         {{#pathParams}}// path params
+        {{#collectionFormat}}
+        if (is_array(${{paramName}})) {
+            ${{paramName}} = $this->apiClient->getSerializer()->serializeCollection(${{paramName}}, '{{collectionFormat}}');
+        }
+        {{/collectionFormat}}
         if (${{paramName}} !== null) {
             $resourcePath = str_replace(
                 "{" . "{{baseName}}" . "}",