/**
* Set the ihost. Returns true on success, false on failure (if there are
* any invalid characters).
*
* @param string $ihost
* @return bool
*/
protected function set_host($ihost)
{
if ($ihost === null) {
$this->ihost = null;
return true;
} elseif (substr($ihost, 0, 1) === '[' && substr($ihost, -1) === ']') {
if (Requests_IPv6::check_ipv6(substr($ihost, 1, -1))) {
$this->ihost = '[' . Requests_IPv6::compress(substr($ihost, 1, -1)) . ']';
} else {
$this->ihost = null;
return false;
}
} else {
$ihost = $this->replace_invalid_with_pct_encoding($ihost, '!$&\'()*+,;=');
// Lowercase, but ignore pct-encoded sections (as they should
// remain uppercase). This must be done after the previous step
// as that can add unescaped characters.
$position = 0;
$strlen = strlen($ihost);
while (($position += strcspn($ihost, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ%', $position)) < $strlen) {
if ($ihost[$position] === '%') {
$position += 3;
} else {
$ihost[$position] = strtolower($ihost[$position]);
$position++;
}
}
$this->ihost = $ihost;
}
$this->scheme_normalization();
return true;
}
/**
* Determines if an IP address is valid.
*
* Handles both IPv4 and IPv6 addresses.
*
* @since 4.7.0
*
* @param string $ip IP address.
* @return string|false The valid IP address, otherwise false.
*/
function rest_is_ip_address($ip)
{
$ipv4_pattern = '/^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/';
if (!preg_match($ipv4_pattern, $ip) && !Requests_IPv6::check_ipv6($ip)) {
return false;
}
return $ip;
}