[PHP] 获取访问者公网 IP php 获取网页访问者的IP<?php function getip() { if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown")) { $ip = getenv("HTTP_CLIENT_IP"); } else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")){ $ip = getenv("HTTP_X_FORWARDED_FOR"); } else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown")) { $ip = getenv("REMOTE_ADDR"); } else if (isset ($_SERVER[''REMOTE_ADDR'']) && $_SERVER[''REMOTE_ADDR''] && strcasecmp($_SERVER[''REMOTE_ADDR''], "unknown")) { $ip = $_SERVER[''REMOTE_ADDR'']; } else { $ip = "unknown"; } return ($ip); } echo getip(); ?>