void      PEAR_ErrorStack::_log ( 
      array $err
       , array  $levels = array(
                'exception' => PEAR_LOG_CRIT,
                'alert' => PEAR_LOG_ALERT,
                'critical' => PEAR_LOG_CRIT,
                'error' => PEAR_LOG_ERR,
                'warning' => PEAR_LOG_WARNING,
                'notice' => PEAR_LOG_NOTICE,
                'info' => PEAR_LOG_INFO,
                'debug' => PEAR_LOG_DEBUG)
     )
This is a protected function, and should only be called by child classes that extend PEAR_ErrorStack
$err
       Error array
$levels
       Error level => Log constant map
throws no exceptions thrown
This function can not be called statically.