private function handleConfig(array $config)
{
foreach ($config as $key => $value) {
if (trim($value) == '') {
unset($config[$key]);
}
}
// Make sure internal_memory_limit is always set
if (!isset($config['internal_memory_limit'])) {
$config['internal_memory_limit'] = ini_get('memory_limit');
}
$this->config = array_merge($this->config, $config);
}