php获取客户端外网/公网IP的代码_PHP教程
方法一:curl
function get_onlineip() {
$ch = curl_init(http://www.ip138.com/ip2city.asp);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$a = curl_exec($ch);
preg_match(/[(.*)]/, $a, $ip);
return $ip[1];
}
方法二:$_SERVER[HTTP_X_FORWARDED_FOR]来获取相应的地址
function get_onlineip() {
$onlineip = ;
if(getenv(HTTP_CLIENT_IP) && strcasecmp(getenv(HTTP_CLIENT_IP), unknown)) {
$onlineip = getenv(HTTP_CLIENT_IP);
} elseif(getenv(HTTP_X_FORWARDED_FOR) && strcasecmp(getenv(HTTP_X_FORWARDED_FOR), unknown)) {
$onlineip = getenv(HTTP_X_FORWARDED_FOR);
} elseif(getenv(REMOTE_ADDR) && strcasecmp(getenv(REMOTE_ADDR), unknown)) {
$onlineip = getenv(REMOTE_ADDR);
} elseif(isset($_SERVER[REMOTE_ADDR]) && $_SERVER[REMOTE_ADDR] && strcasecmp($_SERVER[REMOTE_ADDR], unknown)) {
$onlineip = $_SERVER[REMOTE_ADDR];
}
return $onlineip;
}
echo get_onlineip();
?>
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