PHP获取客户端和服务器的IP地址

<?php//客户端IPfunction get_client_ip(){if(getenv('HTTP_CLIENT_IP')){$client_ip = getenv('HTTP_CLIENT_IP');}else if(getenv('HTTP_X_FORWARDED_FOR')){$client_ip = getenv('HTTP_X_FORWARDED_FOR');}else if(getenv('REMOTE_ADDR')){$client_ip = getenv('REMOTE_ADDR');}else{$client_ip = $HTTP_SERVER_VAR['REMOTE_ADDR'];}return $client_ip;}//服务器IPfunction get_server_ip(){if(isset($_SERVER)){if($_SERVER['SERVER_ADDR'])$get_ip = $_SERVER['SERVER_ADDR'];else$get_ip = $_SERVER['LOCAL_ADDR'];}else{$get_ip = getenv('SERVER_ADDR');}return $get_ip;}echo get_client_ip();echo get_server_ip();?>