Getting list IPs from CIDR notation in PHP

Question

Is there a way (or function/class) to get the list of IP addresses from a CIDR notation?

For example, I have 73.35.143.32/27 CIDR and want to get the list of all IP\

Answer 1

Extension to @jonavon 's answer. If you need flat list of IPs. You can convert his function like below.

function cidrToRange($value) {
    $range = array();
    $split = explode('/', $value);
    if (!empty($split[0]) && is_scalar($split[1]) && filter_var($split[0], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
        $rangeStart = ip2long($split[0]) & ((-1 << (32 - (int)$split[1])));
        $rangeEnd = ip2long($split[0]) + pow(2, (32 - (int)$split[1])) - 1;

        for ($i = $rangeStart; $i <= $rangeEnd; $i++) {
            $range[] = long2ip($i);
        }
        return $range;
    } else {
        return $value;
    }
}