merged branch diaspar/2.0-pdosessionstorage-issue3255 (PR symfony#5070)

Commits ------- 9e28593 fixed error on oracle db related to clob data. symfony#3255 Discussion ---------- fixed error on pdosession storage for oracle db. Related to clob data Did a change on 2.0 branch to fix this error symfony#3255 Tested on mysql and Oracle DB. I also ran a phpunit test before commit: phpunit tests/Symfony/Tests/Component/HttpFoundation/SessionStorage/PdoSessionStorageTest.php PHPUnit 3.6.10 by Sebastian Bergmann. Time: 0 seconds, Memory: 2.75Mb OK (3 tests, 5 assertions) Time: 0 seconds, Memory: 2.75Mb

Author: fabpot

src/Symfony/Component/HttpFoundation/SessionStorage/PdoSessionStorage.php

@@ -181,7 +181,8 @@ public function sessionRead($id)
  $sessionRows = $stmt->fetchAll(\PDO::FETCH_NUM);
 
  if (count($sessionRows) == 1) {
- return base64_decode($sessionRows[0][0]);
+ $session = is_resource($sessionRows[0][0]) ? stream_get_contents($sessionRows[0][0]) : $sessionRows[0][0];
+ return base64_decode($session);
  }
 
  // session does not exist, create it