/**
* Fetch value.
*
* @param array $postvars post vars
*
* @return string fetched value
*/
public function fetchValue($postvars)
{
if ($this->hasFlag(self::AF_IP_SINGLEFIELD)) {
return parent::fetchValue($postvars[$this->fieldName()]);
}
if (!$this->isPosted($postvars)) {
return;
}
$parts = [];
for ($i = 0; $i < 4; ++$i) {
$parts[$i] = $postvars[$this->fieldName()][$i];
}
return implode('.', $parts);
}
