src/AppBundle/Common/ConvertIpToolkit.php

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<?php

namespace AppBundle\Common;

class ConvertIpToolkit
{
    //https://www.ipip.net/product/ip.html
    private static $ip = null;

    private static $fp = null;
    private static $offset = null;
    private static $index = null;

    public static function convertIps(array $array)
    {
        $result = array();
        foreach ($array as $key => $value) {
            $location = static::convertIp($value['ip']);
            if ('N/A' == $location) {
                $location = '未知区域';
            }

            $value['location'] = $location;
            $result[$key] = $value;
        }

        return $result;
    }

    public static function convertIp($ip)
    {
        if (true === empty($ip)) {
            return 'N/A';
        }

        $nip = gethostbyname($ip);
        $ipdot = explode('.', $nip);

        if ($ipdot[0] < 0 || $ipdot[0] > 255 || 4 !== count($ipdot)) {
            return 'N/A';
        }

        if (null === self::$fp) {
            self::init();
        }

        $nip2 = pack('N', ip2long($nip));

        $tmp_offset = ((int) $ipdot[0] * 256 + (int) $ipdot[1]) * 4;
        $start = unpack('Vlen', self::$index[$tmp_offset].self::$index[$tmp_offset + 1].self::$index[$tmp_offset + 2].self::$index[$tmp_offset + 3]);

        $index_offset = $index_length = null;
        $max_comp_len = self::$offset['len'] - 262144 - 4;
        for ($start = $start['len'] * 9 + 262144; $start < $max_comp_len; $start += 9) {
            if (self::$index[$start].self::$index[$start + 1].self::$index[$start + 2].self::$index[$start + 3] >= $nip2) {
                $index_offset = unpack('Vlen', self::$index[$start + 4].self::$index[$start + 5].self::$index[$start + 6]."\x0");
                $index_length = unpack('nlen', self::$index[$start + 7].self::$index[$start + 8]);

                break;
            }