| private checkAndReturnCommaSeparatedStringList ( $parameters ) |
private function checkAndReturnCommaSeparatedStringList($parameters)
{
$parameters = trim($parameters);
if (empty($parameters)) {
return '';
}
$parameters = explode(',', $parameters);
$parameters = array_map('trim', $parameters);
$parameters = array_filter($parameters, 'strlen');
$parameters = array_unique($parameters);
return implode(',', $parameters);
}