PHP获取IP方法一：

<?php
function GetIP(){if(!empty($_SERVER["HTTP_CLIENT_IP"])){$cip = $_SERVER["HTTP_CLIENT_IP"];}else if(!empty($_SERVER["HTTP_X_FORWARDED_FOR"])){$cip = $_SERVER["HTTP_X_FORWARDED_FOR"];}else if(!empty($_SERVER["REMOTE_ADDR"])){$cip = $_SERVER["REMOTE_ADDR"];}else{$cip = "无法获取！";return $cip;}
}
?>

PHP获取IP方法二：

<? error_reporting (E_ERROR | E_WARNING | E_PARSE);if($HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"]){$ip = $HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"];}elseif($HTTP_SERVER_VARS["HTTP_CLIENT_IP"]){$ip = $HTTP_SERVER_VARS["HTTP_CLIENT_IP"];}elseif ($HTTP_SERVER_VARS["REMOTE_ADDR"]){$ip = $HTTP_SERVER_VARS["REMOTE_ADDR"];}elseif (getenv("HTTP_X_FORWARDED_FOR")){$ip = getenv("HTTP_X_FORWARDED_FOR");}elseif (getenv("HTTP_CLIENT_IP")){$ip = getenv("HTTP_CLIENT_IP");}elseif (getenv("REMOTE_ADDR")){$ip = getenv("REMOTE_ADDR");}else{$ip = "Unknown";}echo "你的IP地址是:".$ip."<br>";
?>

PHP获取IP方法三：

<? $iipp = $_SERVER["REMOTE_ADDR"];echo $iipp;
?>

PHP获取IP方法四：

<?php $user_IP = ($_SERVER["HTTP_VIA"]) ? $_SERVER["HTTP_X_FORWARDED_FOR"] : $_SERVER["REMOTE_ADDR"];$user_IP = ($user_IP) ? $user_IP : $_SERVER["REMOTE_ADDR"];echo $user_IP;
?>

PHP获取IP方法五：

<?php
function get_real_ip(){$ip=false;if(!empty($_SERVER["HTTP_CLIENT_IP"])){$ip = $_SERVER["HTTP_CLIENT_IP"];}if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){$ips = explode (", ", $_SERVER['HTTP_X_FORWARDED_FOR']);if ($ip){array_unshift($ips, $ip); $ip = FALSE;}for ($i = 0; $i < count($ips); $i++){if (!eregi ("^(10|172\.16|192\.168)\.", $ips[$i])){$ip = $ips[$i];break;}}}return ($ip ? $ip : $_SERVER['REMOTE_ADDR']);
}
echo get_real_ip();
?>

PHP获取IP方法六：

<?php
if(getenv('HTTP_CLIENT_IP')){$onlineip = getenv('HTTP_CLIENT_IP');
}elseif(getenv('HTTP_X_FORWARDED_FOR')){$onlineip = getenv('HTTP_X_FORWARDED_FOR');
}elseif(getenv('REMOTE_ADDR')){$onlineip = getenv('REMOTE_ADDR');
}else{$onlineip = $HTTP_SERVER_VARS['REMOTE_ADDR'];
}
echo $onlineip;
?>