2018-08-11 23:24:30
开发中时常需要获取到来访用户的IP 地址,在PHP中主要通过超全局变量$_SERVER里边的值来获取,方法如下:
/**
* 获取用户IP地址
* @param integer $type 返回类型 0:返回IP地址 1:返回IPV4地址数字
* @param boolean $adv 是否进行高级模式获取 (有可能被伪装)
* @return mixed
*/
function get_user_ip($type = 0,$adv=false) {
$type = $type ? 1 : 0;
static $ip = NULL;
if ($ip !== NULL) return $ip[$type];
if($adv){
if (isset($_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 = $_SERVER['REMOTE_ADDR'];
}
}elseif (isset($_SERVER['REMOTE_ADDR'])) {
$ip = $_SERVER['REMOTE_ADDR'];
}
// IP地址合法验证
$long = sprintf("%u",ip2long($ip));
$ip = $long ? array($ip, $long) : array('0.0.0.0', 0);
return $ip[$type];
}
最后生成于 2024-05-27 22:52:38
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