PHP实现获取客户端IP并获取IP信息

<?php
/**
?* 获取客户端IP
?* @param? integer $type 返回类型 0:string,1:long
?* @return string|long
?*/
function getClientIp($type = 0) {
??? $ip = NULL;
??? if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
??????? $arr = explode(',',$_SERVER['HTTP_X_FORWARDED_FOR']);
??????? $pos = array_search('unknown',$arr);
??????? if(false !== $pos) unset($arr[$pos]);
??????? $ip? = trim($arr[0]);
??? }elseif (isset($_SERVER['HTTP_CLIENT_IP'])) {
??????? $ip = $_SERVER['HTTP_CLIENT_IP'];
??? }elseif (isset($_SERVER['REMOTE_ADDR'])) {
??????? $ip = $_SERVER['REMOTE_ADDR'];
??? }
??? $long = sprintf("%u",ip2long($ip));
??? $ip?? = $long ? array($ip,$long) : array('0.0.0.0',0);
??? return $ip[$type];
}
/**
?* 获取IP信息
?* @param? string|long $ip? IP地址
?* @return array
?*/
function getIpInfo($ip)
{
??? if (is_long($ip)) {
??????? $ip = long2ip($ip);
??? }
??? $api = 'http://ip.taobao.com/service/getIpInfo.php';
??? $ret = file_get_contents($api . '?ip=' . $ip);
??? $ret = json_decode($ret,true);
??? if ($ret['code'] == 0) {
??????? return $ret['data'];
??? }
??? return array();
}