PHP如何获取IPv6地址及$_SERVER['REMOTE_ADDR']是否可靠？

php 获取 ipv6 地址

如何使用 php 获取 ipv6 地址？$_server['remote_addr'] 是否可用？

答案

要获取 ipv6 地址，需要考虑以下脚本：

if (isset($_SERVER)){
  if (isset($_SERVER["HTTP_X_FORWARDED_FOR"])){
    $realip = $_SERVER["HTTP_X_FORWARDED_FOR"];
  } else if (isset($_SERVER["HTTP_CLIENT_IP"])) {
    $realip = $_SERVER["HTTP_CLIENT_IP"];
  } else {
    $realip = $_SERVER["REMOTE_ADDR"];
  }
} else {
  if (getenv("HTTP_X_FORWARDED_FOR")){
    $realip = getenv("HTTP_X_FORWARDED_FOR");
  } else if (getenv("HTTP_CLIENT_IP")) {
    $realip = getenv("HTTP_CLIENT_IP");
  } else {
    $realip = getenv("REMOTE_ADDR");
  }
}
return $realip;