Merge branch '2.7' into 2.8

* 2.7:
  [Validator] phpize default option values
  test for the Validator component to be present
  [DependencyInjection] Fix on-invalid attribute type in xsd
  [FrameworkBundle] Fix PHP form templates on translatable attributes
  [VarDumper] Fix dumping by-ref variadics

Author: nicolas-grekas

DependencyInjection/FrameworkExtension.php

@@ -764,6 +764,10 @@ private function registerValidationConfiguration(array $config, ContainerBuilder
             return;
         }
 
+        if (!class_exists('Symfony\Component\Validator\Validation')) {
+            throw new LogicException('Validation support cannot be enabled as the Validator component is not installed.');
+        }
+
         $loader->load('validator.xml');
 
         $validatorBuilder = $container->getDefinition('validator.builder');

Resources/views/Form/button_attributes.html.php

@@ -1,6 +1,6 @@
 id="<?php echo $view->escape($id) ?>" name="<?php echo $view->escape($full_name) ?>" <?php if ($disabled): ?>disabled="disabled" <?php endif ?>
 <?php foreach ($attr as $k => $v): ?>
-<?php if (in_array($v, array('placeholder', 'title'), true)): ?>
+<?php if (in_array($k, array('placeholder', 'title'), true)): ?>
 <?php printf('%s="%s" ', $view->escape($k), $view->escape(false !== $translation_domain ? $view['translator']->trans($v, array(), $translation_domain) : $v)) ?>
 <?php elseif ($v === true): ?>
 <?php printf('%s="%s" ', $view->escape($k), $view->escape($k)) ?>

Resources/views/Form/widget_container_attributes.html.php

@@ -1,6 +1,6 @@
 <?php if (!empty($id)): ?>id="<?php echo $view->escape($id) ?>" <?php endif ?>
 <?php foreach ($attr as $k => $v): ?>
-<?php if (in_array($v, array('placeholder', 'title'), true)): ?>
+<?php if (in_array($k, array('placeholder', 'title'), true)): ?>
 <?php printf('%s="%s" ', $view->escape($k), $view->escape(false !== $translation_domain ? $view['translator']->trans($v, array(), $translation_domain) : $v)) ?>
 <?php elseif ($v === true): ?>
 <?php printf('%s="%s" ', $view->escape($k), $view->escape($k)) ?>