private function matchesEmergencyNumberHelper($number, $regionCode, $allowPrefixMatch)
{
$number = PhoneNumberUtil::extractPossibleNumber($number);
$matcher = new Matcher(PhoneNumberUtil::$PLUS_CHARS_PATTERN, $number);
if ($matcher->lookingAt()) {
// Returns false if the number starts with a plus sign. WE don't believe dialling the country
// code before emergency numbers (e.g. +1911) works, but later, if that proves to work, we can
// add additional logic here to handle it.
return false;
}
$metadata = $this->getMetadataForRegion($regionCode);
if ($metadata === null || !$metadata->hasEmergency()) {
return false;
}
$emergencyNumberPattern = $metadata->getEmergency()->getNationalNumberPattern();
$normalizedNumber = PhoneNumberUtil::normalizeDigitsOnly($number);
$emergencyMatcher = new Matcher($emergencyNumberPattern, $normalizedNumber);
return !$allowPrefixMatch || in_array($regionCode, self::$regionsWhereEmergencyNumbersMustBeExact) ? $emergencyMatcher->matches() : $emergencyMatcher->lookingAt();
}
