php通过IP获取访问来自哪个国家

试试这个简单的PHP函数。

<?php

function ip_info($ip = NULL, $purpose = \"location\", $deep_detect = TRUE) {
    $output = NULL;
    if (filter_var($ip, FILTER_VALIDATE_IP) === FALSE) {
        $ip = $_SERVER[\"REMOTE_ADDR\"];
        if ($deep_detect) {
            if (filter_var(@$_SERVER[\'HTTP_X_FORWARDED_FOR\'], FILTER_VALIDATE_IP))
                $ip = $_SERVER[\'HTTP_X_FORWARDED_FOR\'];
            if (filter_var(@$_SERVER[\'HTTP_CLIENT_IP\'], FILTER_VALIDATE_IP))
                $ip = $_SERVER[\'HTTP_CLIENT_IP\'];
        }
    }
    $purpose    = str_replace(array(\"name\", \"\\n\", \"\\t\", \" \", \"-\", \"_\"), NULL, strtolower(trim($purpose)));
    $support    = array(\"country\", \"countrycode\", \"state\", \"region\", \"city\", \"location\", \"address\");
    $continents = array(
        \"AF\" => \"Africa\",
        \"AN\" => \"Antarctica\",
        \"AS\" => \"Asia\",
        \"EU\" => \"Europe\",
        \"OC\" => \"Australia (Oceania)\",
        \"NA\" => \"North America\",
        \"SA\" => \"South America\"
    );
    if (filter_var($ip, FILTER_VALIDATE_IP) && in_array($purpose, $support)) {
        $ipdat = @json_decode(file_get_contents(\"http://www.geoplugin.net/json.gp?ip=\" . $ip));
        if (@strlen(trim($ipdat->geoplugin_countryCode)) == 2) {
            switch ($purpose) {
                case \"location\":
                    $output = array(
                        \"city\"           => @$ipdat->geoplugin_city,
                        \"state\"          => @$ipdat->geoplugin_regionName,
                        \"country\"        => @$ipdat->geoplugin_countryName,
                        \"country_code\"   => @$ipdat->geoplugin_countryCode,
                        \"continent\"      => @$continents[strtoupper($ipdat->geoplugin_continentCode)],
                        \"continent_code\" => @$ipdat->geoplugin_continentCode
                    );
                    break;
                case \"address\":
                    $address = array($ipdat->geoplugin_countryName);
                    if (@strlen($ipdat->geoplugin_regionName) >= 1)
                        $address[] = $ipdat->geoplugin_regionName;
                    if (@strlen($ipdat->geoplugin_city) >= 1)
                        $address[] = $ipdat->geoplugin_city;
                    $output = implode(\", \", array_reverse($address));
                    break;
                case \"city\":
                    $output = @$ipdat->geoplugin_city;
                    break;
                case \"state\":
                    $output = @$ipdat->geoplugin_regionName;
                    break;
                case \"region\":
                    $output = @$ipdat->geoplugin_regionName;
                    break;
                case \"country\":
                    $output = @$ipdat->geoplugin_countryName;
                    break;
                case \"countrycode\":
                    $output = @$ipdat->geoplugin_countryCode;
                    break;
            }
        }
    }
    return $output;
}

?>

如何使用：

示例1：获取访客IP地址详细信息

<?php

echo ip_info(\"Visitor\", \"Country\"); // India
echo ip_info(\"Visitor\", \"Country Code\"); // IN
echo ip_info(\"Visitor\", \"State\"); // Andhra Pradesh
echo ip_info(\"Visitor\", \"City\"); // Proddatur
echo ip_info(\"Visitor\", \"Address\"); // Proddatur, Andhra Pradesh, India

print_r(ip_info(\"Visitor\", \"Location\")); // Array ( [city] => Proddatur [state] => Andhra Pradesh [country] => India [country_code] => IN [continent] => Asia [continent_code] => AS )

?>

示例2：获取任何IP地址的详细信息。[支持IPV4和IPV6]

<?php

echo ip_info(\"173.252.110.27\", \"Country\"); // United States
echo ip_info(\"173.252.110.27\", \"Country Code\"); // US
echo ip_info(\"173.252.110.27\", \"State\"); // California
echo ip_info(\"173.252.110.27\", \"City\"); // Menlo Park
echo ip_info(\"173.252.110.27\", \"Address\"); // Menlo Park, California, United States

print_r(ip_info(\"173.252.110.27\", \"Location\")); // Array ( [city] => Menlo Park [state] => California [country] => United States [country_code] => US [continent] => North America [continent_code] => NA )

?>