PHP获取正解的IP和验证IP

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获取 IP:

function getIpAddress() {foreach (array('HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR', 'HTTP_X_FORWARDED', 'HTTP_X_CLUSTER_CLIENT_IP', 'HTTP_FORWARDED_FOR', 'HTTP_FORWARDED', 'REMOTE_ADDR') as $key) {if (array_key_exists($key, $_SERVER) === true) {foreach (explode(',', $_SERVER[$key]) as $ip) {$ip = trim($ip); // just to be safe
                if (checkIp($ip) {return $ip;
                }
            }
        }
    }
}

验证 IP:

function checkIp($ip) {if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE) === false) {return false;
    }

    return true;
}