Merge pull request #6155 from claytondaley/php_format

Php serializer was not serializing arrays by default. 

plugins/API/Renderer/Php.php

@@ -47,7 +47,7 @@ class Php extends ApiRenderer
             return $this->renderDataTable($array);
         }
 
-        if ($this->shouldSerialize(0)) {
+        if ($this->shouldSerialize(1)) {
             return serialize($array);
         }
 

plugins/UserCountryMap/Controller.php

@@ -221,7 +221,7 @@ class Controller extends \Piwik\Plugin\Controller
             . '&token_auth=' . $token_auth
             . '&filter_limit=-1'
         );
-        $metaData = $request->process();
+        $metaData = unserialize($request->process());
 
         $metrics = array();
         foreach ($metaData[0]['metrics'] as $id => $val) {