Merge branch '2.7' into 2.8

* 2.7:
  Using FQ name for PHP_VERSION_ID
  [Form] Fix \IntlDateFormatter timezone parameter usage to bypass PHP bug #66323
  Harden the debugging of Twig filters and functions
  bumped Symfony version to 2.7.29
  updated VERSION for 2.7.28
  update CONTRIBUTORS for 2.7.28
  updated CHANGELOG for 2.7.28

Author: fabpot

Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformer.php

@@ -163,6 +163,10 @@ protected function getIntlDateFormatter($ignoreTimezone = false)
         $dateFormat = $this->dateFormat;
         $timeFormat = $this->timeFormat;
         $timezone = $ignoreTimezone ? 'UTC' : $this->outputTimezone;
+        if (class_exists('IntlTimeZone', false)) {
+            // see https://bugs.php.net/bug.php?id=66323
+            $timezone = \IntlTimeZone::createTimeZone($timezone);
+        }
         $calendar = $this->calendar;
         $pattern = $this->pattern;
 

Extension/Core/Type/DateType.php

@@ -82,7 +82,8 @@ public function buildForm(FormBuilderInterface $builder, array $options)
                 \Locale::getDefault(),
                 $dateFormat,
                 $timeFormat,
-                null,
+                // see https://bugs.php.net/bug.php?id=66323
+                class_exists('IntlTimeZone', false) ? \IntlTimeZone::createDefault() : null,
                 $calendar,
                 $pattern
             );
@@ -306,7 +307,7 @@ private function formatTimestamps(\IntlDateFormatter $formatter, $regex, array $
         $timezone = $formatter->getTimezoneId();
         $formattedTimestamps = array();
 
-        if ($setTimeZone = PHP_VERSION_ID >= 50500 || method_exists($formatter, 'setTimeZone')) {
+        if ($setTimeZone = \PHP_VERSION_ID >= 50500 || method_exists($formatter, 'setTimeZone')) {
             $formatter->setTimeZone('UTC');
         } else {
             $formatter->setTimeZoneId('UTC');

Extension/Csrf/CsrfProvider/DefaultCsrfProvider.php

@@ -75,7 +75,7 @@ public function isCsrfTokenValid($intention, $token)
      */
     protected function getSessionId()
     {
-        if (PHP_VERSION_ID >= 50400) {
+        if (\PHP_VERSION_ID >= 50400) {
             if (PHP_SESSION_NONE === session_status()) {
                 session_start();
             }

Tests/Extension/Validator/ValidatorTypeGuesserTest.php

@@ -90,7 +90,7 @@ public function testGuessRequired($constraint, $guess)
      */
     public function testLegacyGuessRequired()
     {
-        if (PHP_VERSION_ID >= 70000) {
+        if (\PHP_VERSION_ID >= 70000) {
             $this->markTestSkipped('Cannot use a class called True on PHP 7 or higher.');
         }
         $true = 'Symfony\Component\Validator\Constraints\True';