/**
* Set an arbitrary IP range.
* The closest matching prefix will be calculated but the actual range
* stored in the object can be arbitrary.
* @param string $start Starting IP or combination "start-end" string.
* @param string $end Ending IP or null.
*/
public function setRange($ip, $end = null)
{
if (strpos($ip, '-') !== false) {
list($ip, $end) = array_map('trim', explode('-', $ip, 2));
}
if (false === filter_var($ip, FILTER_VALIDATE_IP) || false === filter_var($end, FILTER_VALIDATE_IP)) {
throw new \InvalidArgumentException("Invalid IP range \"{$ip}-{$end}\"");
}
// determine version (4 or 6)
$this->version = false === filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) ? 6 : 4;
$this->istart = IP::inet_ptod($ip);
$this->iend = IP::inet_ptod($end);
// fix order
if (bccomp($this->istart, $this->iend) == 1) {
list($this->istart, $this->iend) = array($this->iend, $this->istart);
list($ip, $end) = array($end, $ip);
}
$this->start = $ip;
$this->end = $end;
// calculate real prefix
$len = $this->version == 4 ? 32 : 128;
$this->prefix = $len - strlen(BC::bcdecbin(BC::bcxor($this->istart, $this->iend)));
}
