1、首先下载GeoIP的IP库。参考《利用GeoIP数据库及API进行地理定位查询》。下载后解压,得到一个GeoIP.dat文件

2、新建一个文件geoip.inc。内容为

 <?php

 /* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 2; tab-width: 2 -*- */
/* geoip.inc
*
* Copyright (C) 2007 MaxMind LLC
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/ define("GEOIP_COUNTRY_BEGIN", 16776960);
define("GEOIP_STATE_BEGIN_REV0", 16700000);
define("GEOIP_STATE_BEGIN_REV1", 16000000);
define("GEOIP_STANDARD", 0);
define("GEOIP_MEMORY_CACHE", 1);
define("GEOIP_SHARED_MEMORY", 2);
define("STRUCTURE_INFO_MAX_SIZE", 20);
define("DATABASE_INFO_MAX_SIZE", 100);
define("GEOIP_COUNTRY_EDITION", 1);
define("GEOIP_PROXY_EDITION", 8);
define("GEOIP_ASNUM_EDITION", 9);
define("GEOIP_NETSPEED_EDITION", 10);
define("GEOIP_REGION_EDITION_REV0", 7);
define("GEOIP_REGION_EDITION_REV1", 3);
define("GEOIP_CITY_EDITION_REV0", 6);
define("GEOIP_CITY_EDITION_REV1", 2);
define("GEOIP_ORG_EDITION", 5);
define("GEOIP_ISP_EDITION", 4);
define("SEGMENT_RECORD_LENGTH", 3);
define("STANDARD_RECORD_LENGTH", 3);
define("ORG_RECORD_LENGTH", 4);
define("MAX_RECORD_LENGTH", 4);
define("MAX_ORG_RECORD_LENGTH", 300);
define("GEOIP_SHM_KEY", 0x4f415401);
define("US_OFFSET", 1);
define("CANADA_OFFSET", 677);
define("WORLD_OFFSET", 1353);
define("FIPS_RANGE", 360);
define("GEOIP_UNKNOWN_SPEED", 0);
define("GEOIP_DIALUP_SPEED", 1);
define("GEOIP_CABLEDSL_SPEED", 2);
define("GEOIP_CORPORATE_SPEED", 3);
define("GEOIP_DOMAIN_EDITION", 11);
define("GEOIP_COUNTRY_EDITION_V6", 12);
define("GEOIP_LOCATIONA_EDITION", 13);
define("GEOIP_ACCURACYRADIUS_EDITION", 14);
define("GEOIP_CITYCOMBINED_EDITION", 15);
define("GEOIP_CITY_EDITION_REV1_V6", 30);
define("GEOIP_CITY_EDITION_REV0_V6", 31);
define("GEOIP_NETSPEED_EDITION_REV1", 32);
define("GEOIP_NETSPEED_EDITION_REV1_V6", 33);
define("GEOIP_USERTYPE_EDITION", 28);
define("GEOIP_USERTYPE_EDITION_V6", 29);
define("GEOIP_ASNUM_EDITION_V6", 21);
define("GEOIP_ISP_EDITION_V6", 22);
define("GEOIP_ORG_EDITION_V6", 23);
define("GEOIP_DOMAIN_EDITION_V6", 24); define("CITYCOMBINED_FIXED_RECORD", 7); class GeoIP
{
public $flags;
public $filehandle;
public $memory_buffer;
public $databaseType;
public $databaseSegments;
public $record_length;
public $shmid;
public $GEOIP_COUNTRY_CODE_TO_NUMBER = array(
"" => 0,
"AP" => 1,
"EU" => 2,
"AD" => 3,
"AE" => 4,
"AF" => 5,
"AG" => 6,
"AI" => 7,
"AL" => 8,
"AM" => 9,
"CW" => 10,
"AO" => 11,
"AQ" => 12,
"AR" => 13,
"AS" => 14,
"AT" => 15,
"AU" => 16,
"AW" => 17,
"AZ" => 18,
"BA" => 19,
"BB" => 20,
"BD" => 21,
"BE" => 22,
"BF" => 23,
"BG" => 24,
"BH" => 25,
"BI" => 26,
"BJ" => 27,
"BM" => 28,
"BN" => 29,
"BO" => 30,
"BR" => 31,
"BS" => 32,
"BT" => 33,
"BV" => 34,
"BW" => 35,
"BY" => 36,
"BZ" => 37,
"CA" => 38,
"CC" => 39,
"CD" => 40,
"CF" => 41,
"CG" => 42,
"CH" => 43,
"CI" => 44,
"CK" => 45,
"CL" => 46,
"CM" => 47,
"CN" => 48,
"CO" => 49,
"CR" => 50,
"CU" => 51,
"CV" => 52,
"CX" => 53,
"CY" => 54,
"CZ" => 55,
"DE" => 56,
"DJ" => 57,
"DK" => 58,
"DM" => 59,
"DO" => 60,
"DZ" => 61,
"EC" => 62,
"EE" => 63,
"EG" => 64,
"EH" => 65,
"ER" => 66,
"ES" => 67,
"ET" => 68,
"FI" => 69,
"FJ" => 70,
"FK" => 71,
"FM" => 72,
"FO" => 73,
"FR" => 74,
"SX" => 75,
"GA" => 76,
"GB" => 77,
"GD" => 78,
"GE" => 79,
"GF" => 80,
"GH" => 81,
"GI" => 82,
"GL" => 83,
"GM" => 84,
"GN" => 85,
"GP" => 86,
"GQ" => 87,
"GR" => 88,
"GS" => 89,
"GT" => 90,
"GU" => 91,
"GW" => 92,
"GY" => 93,
"HK" => 94,
"HM" => 95,
"HN" => 96,
"HR" => 97,
"HT" => 98,
"HU" => 99,
"ID" => 100,
"IE" => 101,
"IL" => 102,
"IN" => 103,
"IO" => 104,
"IQ" => 105,
"IR" => 106,
"IS" => 107,
"IT" => 108,
"JM" => 109,
"JO" => 110,
"JP" => 111,
"KE" => 112,
"KG" => 113,
"KH" => 114,
"KI" => 115,
"KM" => 116,
"KN" => 117,
"KP" => 118,
"KR" => 119,
"KW" => 120,
"KY" => 121,
"KZ" => 122,
"LA" => 123,
"LB" => 124,
"LC" => 125,
"LI" => 126,
"LK" => 127,
"LR" => 128,
"LS" => 129,
"LT" => 130,
"LU" => 131,
"LV" => 132,
"LY" => 133,
"MA" => 134,
"MC" => 135,
"MD" => 136,
"MG" => 137,
"MH" => 138,
"MK" => 139,
"ML" => 140,
"MM" => 141,
"MN" => 142,
"MO" => 143,
"MP" => 144,
"MQ" => 145,
"MR" => 146,
"MS" => 147,
"MT" => 148,
"MU" => 149,
"MV" => 150,
"MW" => 151,
"MX" => 152,
"MY" => 153,
"MZ" => 154,
"NA" => 155,
"NC" => 156,
"NE" => 157,
"NF" => 158,
"NG" => 159,
"NI" => 160,
"NL" => 161,
"NO" => 162,
"NP" => 163,
"NR" => 164,
"NU" => 165,
"NZ" => 166,
"OM" => 167,
"PA" => 168,
"PE" => 169,
"PF" => 170,
"PG" => 171,
"PH" => 172,
"PK" => 173,
"PL" => 174,
"PM" => 175,
"PN" => 176,
"PR" => 177,
"PS" => 178,
"PT" => 179,
"PW" => 180,
"PY" => 181,
"QA" => 182,
"RE" => 183,
"RO" => 184,
"RU" => 185,
"RW" => 186,
"SA" => 187,
"SB" => 188,
"SC" => 189,
"SD" => 190,
"SE" => 191,
"SG" => 192,
"SH" => 193,
"SI" => 194,
"SJ" => 195,
"SK" => 196,
"SL" => 197,
"SM" => 198,
"SN" => 199,
"SO" => 200,
"SR" => 201,
"ST" => 202,
"SV" => 203,
"SY" => 204,
"SZ" => 205,
"TC" => 206,
"TD" => 207,
"TF" => 208,
"TG" => 209,
"TH" => 210,
"TJ" => 211,
"TK" => 212,
"TM" => 213,
"TN" => 214,
"TO" => 215,
"TL" => 216,
"TR" => 217,
"TT" => 218,
"TV" => 219,
"TW" => 220,
"TZ" => 221,
"UA" => 222,
"UG" => 223,
"UM" => 224,
"US" => 225,
"UY" => 226,
"UZ" => 227,
"VA" => 228,
"VC" => 229,
"VE" => 230,
"VG" => 231,
"VI" => 232,
"VN" => 233,
"VU" => 234,
"WF" => 235,
"WS" => 236,
"YE" => 237,
"YT" => 238,
"RS" => 239,
"ZA" => 240,
"ZM" => 241,
"ME" => 242,
"ZW" => 243,
"A1" => 244,
"A2" => 245,
"O1" => 246,
"AX" => 247,
"GG" => 248,
"IM" => 249,
"JE" => 250,
"BL" => 251,
"MF" => 252,
"BQ" => 253,
"SS" => 254
); public $GEOIP_COUNTRY_CODES = array(
"",
"AP",
"EU",
"AD",
"AE",
"AF",
"AG",
"AI",
"AL",
"AM",
"CW",
"AO",
"AQ",
"AR",
"AS",
"AT",
"AU",
"AW",
"AZ",
"BA",
"BB",
"BD",
"BE",
"BF",
"BG",
"BH",
"BI",
"BJ",
"BM",
"BN",
"BO",
"BR",
"BS",
"BT",
"BV",
"BW",
"BY",
"BZ",
"CA",
"CC",
"CD",
"CF",
"CG",
"CH",
"CI",
"CK",
"CL",
"CM",
"CN",
"CO",
"CR",
"CU",
"CV",
"CX",
"CY",
"CZ",
"DE",
"DJ",
"DK",
"DM",
"DO",
"DZ",
"EC",
"EE",
"EG",
"EH",
"ER",
"ES",
"ET",
"FI",
"FJ",
"FK",
"FM",
"FO",
"FR",
"SX",
"GA",
"GB",
"GD",
"GE",
"GF",
"GH",
"GI",
"GL",
"GM",
"GN",
"GP",
"GQ",
"GR",
"GS",
"GT",
"GU",
"GW",
"GY",
"HK",
"HM",
"HN",
"HR",
"HT",
"HU",
"ID",
"IE",
"IL",
"IN",
"IO",
"IQ",
"IR",
"IS",
"IT",
"JM",
"JO",
"JP",
"KE",
"KG",
"KH",
"KI",
"KM",
"KN",
"KP",
"KR",
"KW",
"KY",
"KZ",
"LA",
"LB",
"LC",
"LI",
"LK",
"LR",
"LS",
"LT",
"LU",
"LV",
"LY",
"MA",
"MC",
"MD",
"MG",
"MH",
"MK",
"ML",
"MM",
"MN",
"MO",
"MP",
"MQ",
"MR",
"MS",
"MT",
"MU",
"MV",
"MW",
"MX",
"MY",
"MZ",
"NA",
"NC",
"NE",
"NF",
"NG",
"NI",
"NL",
"NO",
"NP",
"NR",
"NU",
"NZ",
"OM",
"PA",
"PE",
"PF",
"PG",
"PH",
"PK",
"PL",
"PM",
"PN",
"PR",
"PS",
"PT",
"PW",
"PY",
"QA",
"RE",
"RO",
"RU",
"RW",
"SA",
"SB",
"SC",
"SD",
"SE",
"SG",
"SH",
"SI",
"SJ",
"SK",
"SL",
"SM",
"SN",
"SO",
"SR",
"ST",
"SV",
"SY",
"SZ",
"TC",
"TD",
"TF",
"TG",
"TH",
"TJ",
"TK",
"TM",
"TN",
"TO",
"TL",
"TR",
"TT",
"TV",
"TW",
"TZ",
"UA",
"UG",
"UM",
"US",
"UY",
"UZ",
"VA",
"VC",
"VE",
"VG",
"VI",
"VN",
"VU",
"WF",
"WS",
"YE",
"YT",
"RS",
"ZA",
"ZM",
"ME",
"ZW",
"A1",
"A2",
"O1",
"AX",
"GG",
"IM",
"JE",
"BL",
"MF",
"BQ",
"SS",
"O1"
); public $GEOIP_COUNTRY_CODES3 = array(
"",
"AP",
"EU",
"AND",
"ARE",
"AFG",
"ATG",
"AIA",
"ALB",
"ARM",
"CUW",
"AGO",
"ATA",
"ARG",
"ASM",
"AUT",
"AUS",
"ABW",
"AZE",
"BIH",
"BRB",
"BGD",
"BEL",
"BFA",
"BGR",
"BHR",
"BDI",
"BEN",
"BMU",
"BRN",
"BOL",
"BRA",
"BHS",
"BTN",
"BVT",
"BWA",
"BLR",
"BLZ",
"CAN",
"CCK",
"COD",
"CAF",
"COG",
"CHE",
"CIV",
"COK",
"CHL",
"CMR",
"CHN",
"COL",
"CRI",
"CUB",
"CPV",
"CXR",
"CYP",
"CZE",
"DEU",
"DJI",
"DNK",
"DMA",
"DOM",
"DZA",
"ECU",
"EST",
"EGY",
"ESH",
"ERI",
"ESP",
"ETH",
"FIN",
"FJI",
"FLK",
"FSM",
"FRO",
"FRA",
"SXM",
"GAB",
"GBR",
"GRD",
"GEO",
"GUF",
"GHA",
"GIB",
"GRL",
"GMB",
"GIN",
"GLP",
"GNQ",
"GRC",
"SGS",
"GTM",
"GUM",
"GNB",
"GUY",
"HKG",
"HMD",
"HND",
"HRV",
"HTI",
"HUN",
"IDN",
"IRL",
"ISR",
"IND",
"IOT",
"IRQ",
"IRN",
"ISL",
"ITA",
"JAM",
"JOR",
"JPN",
"KEN",
"KGZ",
"KHM",
"KIR",
"COM",
"KNA",
"PRK",
"KOR",
"KWT",
"CYM",
"KAZ",
"LAO",
"LBN",
"LCA",
"LIE",
"LKA",
"LBR",
"LSO",
"LTU",
"LUX",
"LVA",
"LBY",
"MAR",
"MCO",
"MDA",
"MDG",
"MHL",
"MKD",
"MLI",
"MMR",
"MNG",
"MAC",
"MNP",
"MTQ",
"MRT",
"MSR",
"MLT",
"MUS",
"MDV",
"MWI",
"MEX",
"MYS",
"MOZ",
"NAM",
"NCL",
"NER",
"NFK",
"NGA",
"NIC",
"NLD",
"NOR",
"NPL",
"NRU",
"NIU",
"NZL",
"OMN",
"PAN",
"PER",
"PYF",
"PNG",
"PHL",
"PAK",
"POL",
"SPM",
"PCN",
"PRI",
"PSE",
"PRT",
"PLW",
"PRY",
"QAT",
"REU",
"ROU",
"RUS",
"RWA",
"SAU",
"SLB",
"SYC",
"SDN",
"SWE",
"SGP",
"SHN",
"SVN",
"SJM",
"SVK",
"SLE",
"SMR",
"SEN",
"SOM",
"SUR",
"STP",
"SLV",
"SYR",
"SWZ",
"TCA",
"TCD",
"ATF",
"TGO",
"THA",
"TJK",
"TKL",
"TKM",
"TUN",
"TON",
"TLS",
"TUR",
"TTO",
"TUV",
"TWN",
"TZA",
"UKR",
"UGA",
"UMI",
"USA",
"URY",
"UZB",
"VAT",
"VCT",
"VEN",
"VGB",
"VIR",
"VNM",
"VUT",
"WLF",
"WSM",
"YEM",
"MYT",
"SRB",
"ZAF",
"ZMB",
"MNE",
"ZWE",
"A1",
"A2",
"O1",
"ALA",
"GGY",
"IMN",
"JEY",
"BLM",
"MAF",
"BES",
"SSD",
"O1"
); public $GEOIP_COUNTRY_NAMES = array(
"",
"Asia/Pacific Region",
"Europe",
"Andorra",
"United Arab Emirates",
"Afghanistan",
"Antigua and Barbuda",
"Anguilla",
"Albania",
"Armenia",
"Curacao",
"Angola",
"Antarctica",
"Argentina",
"American Samoa",
"Austria",
"Australia",
"Aruba",
"Azerbaijan",
"Bosnia and Herzegovina",
"Barbados",
"Bangladesh",
"Belgium",
"Burkina Faso",
"Bulgaria",
"Bahrain",
"Burundi",
"Benin",
"Bermuda",
"Brunei Darussalam",
"Bolivia",
"Brazil",
"Bahamas",
"Bhutan",
"Bouvet Island",
"Botswana",
"Belarus",
"Belize",
"Canada",
"Cocos (Keeling) Islands",
"Congo, The Democratic Republic of the",
"Central African Republic",
"Congo",
"Switzerland",
"Cote D'Ivoire",
"Cook Islands",
"Chile",
"Cameroon",
"China",
"Colombia",
"Costa Rica",
"Cuba",
"Cape Verde",
"Christmas Island",
"Cyprus",
"Czech Republic",
"Germany",
"Djibouti",
"Denmark",
"Dominica",
"Dominican Republic",
"Algeria",
"Ecuador",
"Estonia",
"Egypt",
"Western Sahara",
"Eritrea",
"Spain",
"Ethiopia",
"Finland",
"Fiji",
"Falkland Islands (Malvinas)",
"Micronesia, Federated States of",
"Faroe Islands",
"France",
"Sint Maarten (Dutch part)",
"Gabon",
"United Kingdom",
"Grenada",
"Georgia",
"French Guiana",
"Ghana",
"Gibraltar",
"Greenland",
"Gambia",
"Guinea",
"Guadeloupe",
"Equatorial Guinea",
"Greece",
"South Georgia and the South Sandwich Islands",
"Guatemala",
"Guam",
"Guinea-Bissau",
"Guyana",
"Hong Kong",
"Heard Island and McDonald Islands",
"Honduras",
"Croatia",
"Haiti",
"Hungary",
"Indonesia",
"Ireland",
"Israel",
"India",
"British Indian Ocean Territory",
"Iraq",
"Iran, Islamic Republic of",
"Iceland",
"Italy",
"Jamaica",
"Jordan",
"Japan",
"Kenya",
"Kyrgyzstan",
"Cambodia",
"Kiribati",
"Comoros",
"Saint Kitts and Nevis",
"Korea, Democratic People's Republic of",
"Korea, Republic of",
"Kuwait",
"Cayman Islands",
"Kazakhstan",
"Lao People's Democratic Republic",
"Lebanon",
"Saint Lucia",
"Liechtenstein",
"Sri Lanka",
"Liberia",
"Lesotho",
"Lithuania",
"Luxembourg",
"Latvia",
"Libya",
"Morocco",
"Monaco",
"Moldova, Republic of",
"Madagascar",
"Marshall Islands",
"Macedonia",
"Mali",
"Myanmar",
"Mongolia",
"Macau",
"Northern Mariana Islands",
"Martinique",
"Mauritania",
"Montserrat",
"Malta",
"Mauritius",
"Maldives",
"Malawi",
"Mexico",
"Malaysia",
"Mozambique",
"Namibia",
"New Caledonia",
"Niger",
"Norfolk Island",
"Nigeria",
"Nicaragua",
"Netherlands",
"Norway",
"Nepal",
"Nauru",
"Niue",
"New Zealand",
"Oman",
"Panama",
"Peru",
"French Polynesia",
"Papua New Guinea",
"Philippines",
"Pakistan",
"Poland",
"Saint Pierre and Miquelon",
"Pitcairn Islands",
"Puerto Rico",
"Palestinian Territory",
"Portugal",
"Palau",
"Paraguay",
"Qatar",
"Reunion",
"Romania",
"Russian Federation",
"Rwanda",
"Saudi Arabia",
"Solomon Islands",
"Seychelles",
"Sudan",
"Sweden",
"Singapore",
"Saint Helena",
"Slovenia",
"Svalbard and Jan Mayen",
"Slovakia",
"Sierra Leone",
"San Marino",
"Senegal",
"Somalia",
"Suriname",
"Sao Tome and Principe",
"El Salvador",
"Syrian Arab Republic",
"Swaziland",
"Turks and Caicos Islands",
"Chad",
"French Southern Territories",
"Togo",
"Thailand",
"Tajikistan",
"Tokelau",
"Turkmenistan",
"Tunisia",
"Tonga",
"Timor-Leste",
"Turkey",
"Trinidad and Tobago",
"Tuvalu",
"Taiwan",
"Tanzania, United Republic of",
"Ukraine",
"Uganda",
"United States Minor Outlying Islands",
"United States",
"Uruguay",
"Uzbekistan",
"Holy See (Vatican City State)",
"Saint Vincent and the Grenadines",
"Venezuela",
"Virgin Islands, British",
"Virgin Islands, U.S.",
"Vietnam",
"Vanuatu",
"Wallis and Futuna",
"Samoa",
"Yemen",
"Mayotte",
"Serbia",
"South Africa",
"Zambia",
"Montenegro",
"Zimbabwe",
"Anonymous Proxy",
"Satellite Provider",
"Other",
"Aland Islands",
"Guernsey",
"Isle of Man",
"Jersey",
"Saint Barthelemy",
"Saint Martin",
"Bonaire, Saint Eustatius and Saba",
"South Sudan",
"Other"
); public $GEOIP_CONTINENT_CODES = array(
"--",
"AS",
"EU",
"EU",
"AS",
"AS",
"NA",
"NA",
"EU",
"AS",
"NA",
"AF",
"AN",
"SA",
"OC",
"EU",
"OC",
"NA",
"AS",
"EU",
"NA",
"AS",
"EU",
"AF",
"EU",
"AS",
"AF",
"AF",
"NA",
"AS",
"SA",
"SA",
"NA",
"AS",
"AN",
"AF",
"EU",
"NA",
"NA",
"AS",
"AF",
"AF",
"AF",
"EU",
"AF",
"OC",
"SA",
"AF",
"AS",
"SA",
"NA",
"NA",
"AF",
"AS",
"AS",
"EU",
"EU",
"AF",
"EU",
"NA",
"NA",
"AF",
"SA",
"EU",
"AF",
"AF",
"AF",
"EU",
"AF",
"EU",
"OC",
"SA",
"OC",
"EU",
"EU",
"NA",
"AF",
"EU",
"NA",
"AS",
"SA",
"AF",
"EU",
"NA",
"AF",
"AF",
"NA",
"AF",
"EU",
"AN",
"NA",
"OC",
"AF",
"SA",
"AS",
"AN",
"NA",
"EU",
"NA",
"EU",
"AS",
"EU",
"AS",
"AS",
"AS",
"AS",
"AS",
"EU",
"EU",
"NA",
"AS",
"AS",
"AF",
"AS",
"AS",
"OC",
"AF",
"NA",
"AS",
"AS",
"AS",
"NA",
"AS",
"AS",
"AS",
"NA",
"EU",
"AS",
"AF",
"AF",
"EU",
"EU",
"EU",
"AF",
"AF",
"EU",
"EU",
"AF",
"OC",
"EU",
"AF",
"AS",
"AS",
"AS",
"OC",
"NA",
"AF",
"NA",
"EU",
"AF",
"AS",
"AF",
"NA",
"AS",
"AF",
"AF",
"OC",
"AF",
"OC",
"AF",
"NA",
"EU",
"EU",
"AS",
"OC",
"OC",
"OC",
"AS",
"NA",
"SA",
"OC",
"OC",
"AS",
"AS",
"EU",
"NA",
"OC",
"NA",
"AS",
"EU",
"OC",
"SA",
"AS",
"AF",
"EU",
"EU",
"AF",
"AS",
"OC",
"AF",
"AF",
"EU",
"AS",
"AF",
"EU",
"EU",
"EU",
"AF",
"EU",
"AF",
"AF",
"SA",
"AF",
"NA",
"AS",
"AF",
"NA",
"AF",
"AN",
"AF",
"AS",
"AS",
"OC",
"AS",
"AF",
"OC",
"AS",
"EU",
"NA",
"OC",
"AS",
"AF",
"EU",
"AF",
"OC",
"NA",
"SA",
"AS",
"EU",
"NA",
"SA",
"NA",
"NA",
"AS",
"OC",
"OC",
"OC",
"AS",
"AF",
"EU",
"AF",
"AF",
"EU",
"AF",
"--",
"--",
"--",
"EU",
"EU",
"EU",
"EU",
"NA",
"NA",
"NA",
"AF",
"--"
);
} function geoip_load_shared_mem($file)
{
$fp = fopen($file, "rb");
if (!$fp) {
print "error opening $file: $php_errormsg\n";
exit;
}
$s_array = fstat($fp);
$size = $s_array['size'];
if (($shmid = @shmop_open(GEOIP_SHM_KEY, "w", 0, 0))) {
shmop_delete($shmid);
shmop_close($shmid);
}
$shmid = shmop_open(GEOIP_SHM_KEY, "c", 0644, $size);
shmop_write($shmid, fread($fp, $size), 0);
shmop_close($shmid);
} function _setup_segments($gi)
{
$gi->databaseType = GEOIP_COUNTRY_EDITION;
$gi->record_length = STANDARD_RECORD_LENGTH;
if ($gi->flags & GEOIP_SHARED_MEMORY) {
$offset = @shmop_size($gi->shmid) - 3;
for ($i = 0; $i < STRUCTURE_INFO_MAX_SIZE; $i++) {
$delim = @shmop_read($gi->shmid, $offset, 3);
$offset += 3;
if ($delim == (chr(255) . chr(255) . chr(255))) {
$gi->databaseType = ord(@shmop_read($gi->shmid, $offset, 1));
if ($gi->databaseType >= 106) {
$gi->databaseType -= 105;
}
$offset++; if ($gi->databaseType == GEOIP_REGION_EDITION_REV0) {
$gi->databaseSegments = GEOIP_STATE_BEGIN_REV0;
} elseif ($gi->databaseType == GEOIP_REGION_EDITION_REV1) {
$gi->databaseSegments = GEOIP_STATE_BEGIN_REV1;
} elseif (($gi->databaseType == GEOIP_CITY_EDITION_REV0)
|| ($gi->databaseType == GEOIP_CITY_EDITION_REV1)
|| ($gi->databaseType == GEOIP_ORG_EDITION)
|| ($gi->databaseType == GEOIP_ORG_EDITION_V6)
|| ($gi->databaseType == GEOIP_DOMAIN_EDITION)
|| ($gi->databaseType == GEOIP_DOMAIN_EDITION_V6)
|| ($gi->databaseType == GEOIP_ISP_EDITION)
|| ($gi->databaseType == GEOIP_ISP_EDITION_V6)
|| ($gi->databaseType == GEOIP_USERTYPE_EDITION)
|| ($gi->databaseType == GEOIP_USERTYPE_EDITION_V6)
|| ($gi->databaseType == GEOIP_LOCATIONA_EDITION)
|| ($gi->databaseType == GEOIP_ACCURACYRADIUS_EDITION)
|| ($gi->databaseType == GEOIP_CITY_EDITION_REV0_V6)
|| ($gi->databaseType == GEOIP_CITY_EDITION_REV1_V6)
|| ($gi->databaseType == GEOIP_NETSPEED_EDITION_REV1)
|| ($gi->databaseType == GEOIP_NETSPEED_EDITION_REV1_V6)
|| ($gi->databaseType == GEOIP_ASNUM_EDITION)
|| ($gi->databaseType == GEOIP_ASNUM_EDITION_V6)
) {
$gi->databaseSegments = 0;
$buf = @shmop_read($gi->shmid, $offset, SEGMENT_RECORD_LENGTH);
for ($j = 0; $j < SEGMENT_RECORD_LENGTH; $j++) {
$gi->databaseSegments += (ord($buf[$j]) << ($j * 8));
}
if (($gi->databaseType == GEOIP_ORG_EDITION)
|| ($gi->databaseType == GEOIP_ORG_EDITION_V6)
|| ($gi->databaseType == GEOIP_DOMAIN_EDITION)
|| ($gi->databaseType == GEOIP_DOMAIN_EDITION_V6)
|| ($gi->databaseType == GEOIP_ISP_EDITION)
|| ($gi->databaseType == GEOIP_ISP_EDITION_V6)
) {
$gi->record_length = ORG_RECORD_LENGTH;
}
}
break;
} else {
$offset -= 4;
}
}
if (($gi->databaseType == GEOIP_COUNTRY_EDITION) ||
($gi->databaseType == GEOIP_COUNTRY_EDITION_V6) ||
($gi->databaseType == GEOIP_PROXY_EDITION) ||
($gi->databaseType == GEOIP_NETSPEED_EDITION)
) {
$gi->databaseSegments = GEOIP_COUNTRY_BEGIN;
}
} else {
$filepos = ftell($gi->filehandle);
fseek($gi->filehandle, -3, SEEK_END);
for ($i = 0; $i < STRUCTURE_INFO_MAX_SIZE; $i++) {
$delim = fread($gi->filehandle, 3);
if ($delim == (chr(255) . chr(255) . chr(255))) {
$gi->databaseType = ord(fread($gi->filehandle, 1));
if ($gi->databaseType >= 106) {
$gi->databaseType -= 105;
}
if ($gi->databaseType == GEOIP_REGION_EDITION_REV0) {
$gi->databaseSegments = GEOIP_STATE_BEGIN_REV0;
} elseif ($gi->databaseType == GEOIP_REGION_EDITION_REV1) {
$gi->databaseSegments = GEOIP_STATE_BEGIN_REV1;
} elseif (($gi->databaseType == GEOIP_CITY_EDITION_REV0)
|| ($gi->databaseType == GEOIP_CITY_EDITION_REV1)
|| ($gi->databaseType == GEOIP_CITY_EDITION_REV0_V6)
|| ($gi->databaseType == GEOIP_CITY_EDITION_REV1_V6)
|| ($gi->databaseType == GEOIP_ORG_EDITION)
|| ($gi->databaseType == GEOIP_DOMAIN_EDITION)
|| ($gi->databaseType == GEOIP_ISP_EDITION)
|| ($gi->databaseType == GEOIP_ORG_EDITION_V6)
|| ($gi->databaseType == GEOIP_DOMAIN_EDITION_V6)
|| ($gi->databaseType == GEOIP_ISP_EDITION_V6)
|| ($gi->databaseType == GEOIP_LOCATIONA_EDITION)
|| ($gi->databaseType == GEOIP_ACCURACYRADIUS_EDITION)
|| ($gi->databaseType == GEOIP_CITY_EDITION_REV0_V6)
|| ($gi->databaseType == GEOIP_CITY_EDITION_REV1_V6)
|| ($gi->databaseType == GEOIP_NETSPEED_EDITION_REV1)
|| ($gi->databaseType == GEOIP_NETSPEED_EDITION_REV1_V6)
|| ($gi->databaseType == GEOIP_USERTYPE_EDITION)
|| ($gi->databaseType == GEOIP_USERTYPE_EDITION_V6)
|| ($gi->databaseType == GEOIP_ASNUM_EDITION)
|| ($gi->databaseType == GEOIP_ASNUM_EDITION_V6)
) {
$gi->databaseSegments = 0;
$buf = fread($gi->filehandle, SEGMENT_RECORD_LENGTH);
for ($j = 0; $j < SEGMENT_RECORD_LENGTH; $j++) {
$gi->databaseSegments += (ord($buf[$j]) << ($j * 8));
}
if (($gi->databaseType == GEOIP_ORG_EDITION)
|| ($gi->databaseType == GEOIP_DOMAIN_EDITION)
|| ($gi->databaseType == GEOIP_ISP_EDITION)
|| ($gi->databaseType == GEOIP_ORG_EDITION_V6)
|| ($gi->databaseType == GEOIP_DOMAIN_EDITION_V6)
|| ($gi->databaseType == GEOIP_ISP_EDITION_V6)
) {
$gi->record_length = ORG_RECORD_LENGTH;
}
}
break;
} else {
fseek($gi->filehandle, -4, SEEK_CUR);
}
}
if (($gi->databaseType == GEOIP_COUNTRY_EDITION) ||
($gi->databaseType == GEOIP_COUNTRY_EDITION_V6) ||
($gi->databaseType == GEOIP_PROXY_EDITION) ||
($gi->databaseType == GEOIP_NETSPEED_EDITION)
) {
$gi->databaseSegments = GEOIP_COUNTRY_BEGIN;
}
fseek($gi->filehandle, $filepos, SEEK_SET);
}
return $gi;
} function geoip_open($filename, $flags)
{
$gi = new GeoIP;
$gi->flags = $flags;
if ($gi->flags & GEOIP_SHARED_MEMORY) {
$gi->shmid = @shmop_open(GEOIP_SHM_KEY, "a", 0, 0);
} else {
$gi->filehandle = fopen($filename, "rb") or trigger_error("GeoIP API: Can not open $filename\n", E_USER_ERROR);
if ($gi->flags & GEOIP_MEMORY_CACHE) {
$s_array = fstat($gi->filehandle);
$gi->memory_buffer = fread($gi->filehandle, $s_array['size']);
}
} $gi = _setup_segments($gi);
return $gi;
} function geoip_close($gi)
{
if ($gi->flags & GEOIP_SHARED_MEMORY) {
return true;
} return fclose($gi->filehandle);
} function geoip_country_id_by_name_v6($gi, $name)
{
$rec = dns_get_record($name, DNS_AAAA);
if (!$rec) {
return false;
}
$addr = $rec[0]["ipv6"];
if (!$addr || $addr == $name) {
return false;
}
return geoip_country_id_by_addr_v6($gi, $addr);
} function geoip_country_id_by_name($gi, $name)
{
$addr = gethostbyname($name);
if (!$addr || $addr == $name) {
return false;
}
return geoip_country_id_by_addr($gi, $addr);
} function geoip_country_code_by_name_v6($gi, $name)
{
$country_id = geoip_country_id_by_name_v6($gi, $name);
if ($country_id !== false) {
return $gi->GEOIP_COUNTRY_CODES[$country_id];
}
return false;
} function geoip_country_code_by_name($gi, $name)
{
$country_id = geoip_country_id_by_name($gi, $name);
if ($country_id !== false) {
return $gi->GEOIP_COUNTRY_CODES[$country_id];
}
return false;
} function geoip_country_name_by_name_v6($gi, $name)
{
$country_id = geoip_country_id_by_name_v6($gi, $name);
if ($country_id !== false) {
return $gi->GEOIP_COUNTRY_NAMES[$country_id];
}
return false;
} function geoip_country_name_by_name($gi, $name)
{
$country_id = geoip_country_id_by_name($gi, $name);
if ($country_id !== false) {
return $gi->GEOIP_COUNTRY_NAMES[$country_id];
}
return false;
} function geoip_country_id_by_addr_v6($gi, $addr)
{
$ipnum = inet_pton($addr);
return _geoip_seek_country_v6($gi, $ipnum) - GEOIP_COUNTRY_BEGIN;
} function geoip_country_id_by_addr($gi, $addr)
{
$ipnum = ip2long($addr);
return _geoip_seek_country($gi, $ipnum) - GEOIP_COUNTRY_BEGIN;
} function geoip_country_code_by_addr_v6($gi, $addr)
{
$country_id = geoip_country_id_by_addr_v6($gi, $addr);
if ($country_id !== false) {
return $gi->GEOIP_COUNTRY_CODES[$country_id];
}
return false;
} function geoip_country_code_by_addr($gi, $addr)
{
if ($gi->databaseType == GEOIP_CITY_EDITION_REV1) {
$record = geoip_record_by_addr($gi, $addr);
if ($record !== false) {
return $record->country_code;
}
} else {
$country_id = geoip_country_id_by_addr($gi, $addr);
if ($country_id !== false) {
return $gi->GEOIP_COUNTRY_CODES[$country_id];
}
}
return false;
} function geoip_country_name_by_addr_v6($gi, $addr)
{
$country_id = geoip_country_id_by_addr_v6($gi, $addr);
if ($country_id !== false) {
return $gi->GEOIP_COUNTRY_NAMES[$country_id];
}
return false;
} function geoip_country_name_by_addr($gi, $addr)
{
if ($gi->databaseType == GEOIP_CITY_EDITION_REV1) {
$record = geoip_record_by_addr($gi, $addr);
return $record->country_name;
} else {
$country_id = geoip_country_id_by_addr($gi, $addr);
if ($country_id !== false) {
return $gi->GEOIP_COUNTRY_NAMES[$country_id];
}
}
return false;
} function _geoip_seek_country_v6($gi, $ipnum)
{
# arrays from unpack start with offset 1
# yet another php mystery. array_merge work around
# this broken behaviour
$v6vec = array_merge(unpack("C16", $ipnum)); $offset = 0;
for ($depth = 127; $depth >= 0; --$depth) {
if ($gi->flags & GEOIP_MEMORY_CACHE) {
$buf = _safe_substr(
$gi->memory_buffer,
2 * $gi->record_length * $offset,
2 * $gi->record_length
);
} elseif ($gi->flags & GEOIP_SHARED_MEMORY) {
$buf = @shmop_read(
$gi->shmid,
2 * $gi->record_length * $offset,
2 * $gi->record_length
);
} else {
fseek($gi->filehandle, 2 * $gi->record_length * $offset, SEEK_SET) == 0
or trigger_error("GeoIP API: fseek failed", E_USER_ERROR);
$buf = fread($gi->filehandle, 2 * $gi->record_length);
}
$x = array(0, 0);
for ($i = 0; $i < 2; ++$i) {
for ($j = 0; $j < $gi->record_length; ++$j) {
$x[$i] += ord($buf[$gi->record_length * $i + $j]) << ($j * 8);
}
} $bnum = 127 - $depth;
$idx = $bnum >> 3;
$b_mask = 1 << ($bnum & 7 ^ 7);
if (($v6vec[$idx] & $b_mask) > 0) {
if ($x[1] >= $gi->databaseSegments) {
return $x[1];
}
$offset = $x[1];
} else {
if ($x[0] >= $gi->databaseSegments) {
return $x[0];
}
$offset = $x[0];
}
}
trigger_error("GeoIP API: Error traversing database - perhaps it is corrupt?", E_USER_ERROR);
return false;
} function _geoip_seek_country($gi, $ipnum)
{
$offset = 0;
for ($depth = 31; $depth >= 0; --$depth) {
if ($gi->flags & GEOIP_MEMORY_CACHE) {
$buf = _safe_substr(
$gi->memory_buffer,
2 * $gi->record_length * $offset,
2 * $gi->record_length
);
} elseif ($gi->flags & GEOIP_SHARED_MEMORY) {
$buf = @shmop_read(
$gi->shmid,
2 * $gi->record_length * $offset,
2 * $gi->record_length
);
} else {
fseek($gi->filehandle, 2 * $gi->record_length * $offset, SEEK_SET) == 0
or trigger_error("GeoIP API: fseek failed", E_USER_ERROR);
$buf = fread($gi->filehandle, 2 * $gi->record_length);
}
$x = array(0, 0);
for ($i = 0; $i < 2; ++$i) {
for ($j = 0; $j < $gi->record_length; ++$j) {
$x[$i] += ord($buf[$gi->record_length * $i + $j]) << ($j * 8);
}
}
if ($ipnum & (1 << $depth)) {
if ($x[1] >= $gi->databaseSegments) {
return $x[1];
}
$offset = $x[1];
} else {
if ($x[0] >= $gi->databaseSegments) {
return $x[0];
}
$offset = $x[0];
}
}
trigger_error("GeoIP API: Error traversing database - perhaps it is corrupt?", E_USER_ERROR);
return false;
} function _common_get_org($gi, $seek_org)
{
$record_pointer = $seek_org + (2 * $gi->record_length - 1) * $gi->databaseSegments;
if ($gi->flags & GEOIP_SHARED_MEMORY) {
$org_buf = @shmop_read($gi->shmid, $record_pointer, MAX_ORG_RECORD_LENGTH);
} else {
fseek($gi->filehandle, $record_pointer, SEEK_SET);
$org_buf = fread($gi->filehandle, MAX_ORG_RECORD_LENGTH);
}
$org_buf = _safe_substr($org_buf, 0, strpos($org_buf, "\0"));
return $org_buf;
} function _get_org_v6($gi, $ipnum)
{
$seek_org = _geoip_seek_country_v6($gi, $ipnum);
if ($seek_org == $gi->databaseSegments) {
return null;
}
return _common_get_org($gi, $seek_org);
} function _get_org($gi, $ipnum)
{
$seek_org = _geoip_seek_country($gi, $ipnum);
if ($seek_org == $gi->databaseSegments) {
return null;
}
return _common_get_org($gi, $seek_org);
} function geoip_name_by_addr_v6($gi, $addr)
{
if ($addr == null) {
return 0;
}
$ipnum = inet_pton($addr);
return _get_org_v6($gi, $ipnum);
} function geoip_name_by_addr($gi, $addr)
{
if ($addr == null) {
return 0;
}
$ipnum = ip2long($addr);
return _get_org($gi, $ipnum);
} function geoip_org_by_addr($gi, $addr)
{
return geoip_name_by_addr($gi, $addr);
} function _get_region($gi, $ipnum)
{
if ($gi->databaseType == GEOIP_REGION_EDITION_REV0) {
$seek_region = _geoip_seek_country($gi, $ipnum) - GEOIP_STATE_BEGIN_REV0;
if ($seek_region >= 1000) {
$country_code = "US";
$region = chr(($seek_region - 1000) / 26 + 65) . chr(($seek_region - 1000) % 26 + 65);
} else {
$country_code = $gi->GEOIP_COUNTRY_CODES[$seek_region];
$region = "";
}
return array($country_code, $region);
} elseif ($gi->databaseType == GEOIP_REGION_EDITION_REV1) {
$seek_region = _geoip_seek_country($gi, $ipnum) - GEOIP_STATE_BEGIN_REV1;
if ($seek_region < US_OFFSET) {
$country_code = "";
$region = "";
} elseif ($seek_region < CANADA_OFFSET) {
$country_code = "US";
$region = chr(($seek_region - US_OFFSET) / 26 + 65) . chr(($seek_region - US_OFFSET) % 26 + 65);
} elseif ($seek_region < WORLD_OFFSET) {
$country_code = "CA";
$region = chr(($seek_region - CANADA_OFFSET) / 26 + 65) . chr(($seek_region - CANADA_OFFSET) % 26 + 65);
} else {
$country_code = $gi->GEOIP_COUNTRY_CODES[(int) (($seek_region - WORLD_OFFSET) / FIPS_RANGE)];
$region = "";
}
return array($country_code, $region);
}
return null;
} function geoip_region_by_addr($gi, $addr)
{
if ($addr == null) {
return 0;
}
$ipnum = ip2long($addr);
return _get_region($gi, $ipnum);
} function _safe_substr($string, $start, $length)
{
// workaround php's broken substr, strpos, etc handling with
// mbstring.func_overload and mbstring.internal_encoding
$mbExists = extension_loaded('mbstring'); if ($mbExists) {
$enc = mb_internal_encoding();
mb_internal_encoding('ISO-8859-1');
} $buf = substr($string, $start, $length); if ($mbExists) {
mb_internal_encoding($enc);
} return $buf;
} function getIPaddress(){
$IPaddress='';
if (isset($_SERVER)){
if (isset($_SERVER["HTTP_X_FORWARDED_FOR"])){
$IPaddress = $_SERVER["HTTP_X_FORWARDED_FOR"];
} else if (isset($_SERVER["HTTP_CLIENT_IP"])) {
$IPaddress = $_SERVER["HTTP_CLIENT_IP"];
} else {
$IPaddress = $_SERVER["REMOTE_ADDR"];
}
} else {
if (getenv("HTTP_X_FORWARDED_FOR")){
$IPaddress = getenv("HTTP_X_FORWARDED_FOR");
} else if (getenv("HTTP_CLIENT_IP")) {
$IPaddress = getenv("HTTP_CLIENT_IP");
} else {
$IPaddress = getenv("REMOTE_ADDR");
}
}
return $IPaddress;
} ?>

3、然后在php文件中写入如下代码

<?php
require('geoip.inc');
$gi = geoip_open('GeoIP.dat',0);
$ip = getIPaddress();
echo geoip_country_code_by_addr($gi, $ip);
?>

具体还可参考http://php.net/geoip/

PHP如何使用GeoIP数据库的更多相关文章

  1. 利用GeoIP数据库及API进行地理定位查询

    GeoIP数据库下载地址:http://geolite.maxmind.com/download/geoip/database/GeoLiteCountry/GeoIP.dat.gz. 首先,在Max ...

  2. 安装GeoIP数据库

    1.安装GeoIP数据库 cd /usr/local/logstash/etc curl -O "http://geolite.maxmind.com/download/geoip/data ...

  3. 利用GeoIP数据库及API进行地理定位查询 Java

    地理定位查询的的数据库比较多,而且大多都开放一些free的版本 国内的有纯真数据库等,但是他只提供文本的地理位置信息,不提供经纬度数据 当应用到google map时,就不可以了 国外的有MaxMin ...

  4. WordPress 设置GeoIP数据库目录权限时错误解决方案

    存在一个问题 更新完WP-statistics后,不知道为什么出现了一个错误提示:设置GeoIP数据库目录权限时错误,请确保您的Web服务器有权限写入到目录/var/www/html/wordpres ...

  5. 自动更新GeoIP数据库

    #!/bin/bash if [ ! -d /usr/local/share/GeoIP ];then mkdir /usr/local/share/GeoIP fi if [ ! -d /usr/l ...

  6. Logstash利用GeoIP库显示地图以及通过useragent显示浏览器(四)

    我们通过Logstash收集的Nginx Access log中已经包含了客户端IP的数据(remote_addr),但是只有这个IP还不够,要在Kibana的显示请求来源的地理位置还需要借助GeoI ...

  7. geoip+php演示样例:通过ip,获取国家名称和代码

    GeoIP + PHP的使用 方法一: 下载 GeoIP 的 PHP 文件geoip.inc,保存为 geoip.inc.php http://sjolzy.cn/php/GeoIP/bak/geoi ...

  8. GeoIP的使用

    GeoIP介绍: 什么是GepIP ? 所谓GeoIP,就是通过来访者的IP, 定位他的经纬度,国家/地区,省市,甚至街道等位置信息.这里面的技术不算难题,关键在于有个精准 的数据库.有了准确的数据源 ...

  9. Logstash利用GeoIP库显示地图以及通过useragent显示浏览器(

    http://www.nibayuan.com/articles/2016/02/23/elk-logstash-geoip-kibana-tilemap.html 我们通过Logstash收集的Ng ...

随机推荐

  1. centos6.5安装elasticsearch

    java下载地址:http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.htmles下载地址 : ...

  2. HTTrack 网站备份工具

    HTTrack可以克隆指定网站-把整个网站下载到本地.可以用在离线浏览上,免费的噢! 强大的Httrack类似于搜索引擎的爬虫,也可以用来收集信息.记得之前写过篇http://www.cnblogs. ...

  3. Microsoft VS 2008 过期解决方法破解方法

    Microsoft VS 2008 过期解决方法电脑上的Microsoft Visual Studio 2008 Team System 试用版提示离过期还有**天.于是百度,搜索结果大多是以下两种解 ...

  4. Optimal Flexible Architecture(最优灵活架构)

    来自:Oracle® Database Installation Guide 12_c_ Release 1 (12.1) for Linux Oracle base目录命名规范: /pm/s/u 例 ...

  5. js == 与 === 的区别

    1.对于string,number等基础类型,==和===是有区别的 1)不同类型间比较,==之比较“转化成同一类型后的值”看“值”是否相等,===如果类型不同,其结果就是不等 2)同类型比较,直接进 ...

  6. 体验Visual Studio 2015 之 MVC - 视图组建

    VS2015 PERVIEW中可以创建MVC 项目. 我们可以 发现有几大亮点. 首先我们看目录结构: 当前项目包含两个主要的文件夹:Solution Items .src 很明显src文件夹下为当前 ...

  7. 【web maven】新建的项目 controller也有,从前台跳转后台 无法找到对应的controller

    碰上很 愣的问题: 使用maven搭建项目完成,项目页面写好,实体.Dao.Service.Controller都有了,但是指定Controller中的某个方法中一直不能从前台进入后台 原因: 没有w ...

  8. Qt中 QString 和int, char等的“相互”转换

    转载:http://blog.csdn.net/ei__nino/article/details/7297791 Qt中 int ,float ,double转换为QString 有两种方法 1.使用 ...

  9. WebGL入门教程(二)-webgl绘制三角形

    前面已经介绍过了webgl,WebGL入门教程(一)-初识webgl(http://www.cnblogs.com/bsman/p/6128447.html),也知道了如何绘制一个点,接下来就用web ...

  10. MD5验证

    commons-codec包可以从apache下载:http://commons.apache.org/codec/download_codec.cgi MD5现在是用来作为一种数字签名算法,即A向B ...