PHP对客户IP的操作

有很多学PHP的小伙伴取客户IP的时候不够精确，下面是比较精确的方法，拿小本本记一下！获取客户端IP地址function get_client_ip($type = 0,$adv=true) {

$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];

}获取IP归属地function get_ip_city($ip){

$ch = curl_init();

$url = 'https://whois.pconline.com.cn/ipJson.jsp?ip='.$ip;

//用curl发送接收数据

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

//请求为https

curl_setopt ( $ch, CURLOPT_SSL_VERIFYPEER, false );

curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);

$location = curl_exec($ch);

curl_close($ch);

//转码

$location = mb_convert_encoding($location, 'utf-8','GB2312');

//var_dump($location);

//截取{}中的字符串

$location = substr($location, strlen('({')+strpos($location, '({'),(strlen($location) - strpos($location, '})'))*(-1));

//将截取的字符串$location中的‘，’替换成‘&’ 将字符串中的‘：‘替换成‘=’

$location = str_replace('"',"",str_replace(":","=",str_replace(",","&",$location)));

//php内置函数，将处理成类似于url参数的格式的字符串 转换成数组

parse_str($location,$ip_location);

return $ip_location['addr'];

}