CakePHP:Warning: session_start() [function.session-start: open(/tmp/sess_xxx, O_RDWR) failed: Permission denied (13) [CORE/Cake/Model/Datasource/CakeSession.php line 618]
CakePHP:Coreserverにて[Warning: SplFileInfo::openFile…failed to open stream: No such file or directory]などのWarningが出るときの対処方法