flatten cookies for header

src/Header/Cookie.php

@@ -97,13 +97,28 @@ public function getFieldValue()
     {
         $nvPairs = [];
 
-        foreach ($this as $name => $value) {
+        foreach ($this->flattenCookies($this) as $name => $value) {
             $nvPairs[] = $name . '=' . (($this->encodeValue) ? urlencode($value) : $value);
         }
 
         return implode('; ', $nvPairs);
     }
 
+    protected function flattenCookies($data, $prefix = null)
+    {
+        $result = [];
+        foreach ($data as $key => $value) {
+            $key = $prefix ? $prefix . '[' . $key . ']' : $key;
+            if (is_array($value)) {
+                $result = array_merge($result, $this->flattenCookies($value, $key));
+            } else {
+                $result[$key] = $value;
+            }
+        }
+
+        return $result;
+    }
+
     public function toString()
     {
         return 'Cookie: ' . $this->getFieldValue();

test/CookiesTest.php

@@ -13,6 +13,7 @@
 use Zend\Http\Response;
 use Zend\Http\Headers;
 use Zend\Http\Cookies;
+use Zend\Http\PhpEnvironment\Request;
 
 class CookiesTest extends \PHPUnit_Framework_TestCase
 {
@@ -43,4 +44,20 @@ public function testFromResponseInCookie()
         $response = Cookies::fromResponse($response, "http://www.zend.com");
         $this->assertSame($header, $response->getCookie('http://www.zend.com', 'foo'));
     }
+
+    public function testRequestCanHaveArrayCookies()
+    {
+        // this happens wich cookie header: "test[a]=value_a&test[b]=value_b"
+        $_COOKIE = [
+            'test' => [
+                'a' => 'value_a',
+                'b' => 'value_b'
+            ]
+        ];
+        $request = new Request();
+
+        $fieldValue = $request->getCookie('test')->getFieldValue();
+
+        $this->assertSame('test[a]=value_a; test[b]=value_b', $fieldValue);
+    }
 }