add_countries.php

function add_countries(){
    $country_array = array(
        "afg" => "Afghanistan",
        "alb" => "Albania",
        "dza" => "Algeria",
        "and" => "Andorra",
        "ago" => "Angola",
        "atg" => "Antigua and Barbuda",
        "arg" => "Argentina",
        "arm" => "Armenia",
        "aus" => "Australia",
        "aut" => "Austria",
        "aze" => "Azerbaijan",
        "bhs" => "Bahamas",
        "bhr" => "Bahrain",
        "bgd" => "Bangladesh",
        "brb" => "Barbados",
        "blr" => "Belarus",
        "bel" => "Belgium",
        "blz" => "Belize",
        "ben" => "Benin",
        "btn" => "Bhutan",
        "bol" => "Bolivia",
        "bih" => "Bosnia and Herzegovina",
        "bwa" => "Botswana",
        "bra" => "Brazil",
        "brn" => "Brunei",
        "bgr" => "Bulgaria",
        "bfa" => "Burkina Faso",
        "bdi" => "Burundi",
        "khm" => "Cambodia",
        "cmr" => "Cameroon",
        "can" => "Canada",
        "cpv" => "Cape Verde",
        "caf" => "Central African Republic",
        "tcd" => "Chad",
        "chl" => "Chile",
        "chn" => "China",
        "col" => "Colombia",
        "com" => "Comoros",
        "cod" => "Congo (DRC)",
        "cog" => "Congo",
        "cri" => "Costa Rica",
        "civ" => "Cote d'Ivoire",
        "hrv" => "Croatia",
        "cub" => "Cuba",
        "cyp" => "Cyprus",
        "cze" => "Czech Republic",
        "dnk" => "Denmark",
        "dji" => "Djibouti",
        "dma" => "Dominica",
        "dom" => "Dominican Republic",
        "ecu" => "Ecuador",
        "egy" => "Egypt",
        "slv" => "El Salvador",
        "gnq" => "Equatorial Guinea",
        "eri" => "Eritrea",
        "est" => "Estonia",
        "eth" => "Ethiopia",
        "fji" => "Fiji",
        "fin" => "Finland",
        "fra" => "France",
        "gab" => "Gabon",
        "gmb" => "Gambia",
        "geo" => "Georgia",
        "deu" => "Germany",
        "gha" => "Ghana",
        "grc" => "Greece",
        "grd" => "Grenada",
        "gtm" => "Guatemala",
        "gin" => "Guinea",
        "gnb" => "Guinea-Bissau",
        "guy" => "Guyana",
        "hti" => "Haiti",
        "hnd" => "Honduras",
        "hun" => "Hungary",
        "isl" => "Iceland",
        "ind" => "India",
        "idn" => "Indonesia",
        "irn" => "Iran",
        "irq" => "Iraq",
        "irl" => "Ireland",
        "isr" => "Israel",
        "ita" => "Italy",
        "jam" => "Jamaica",
        "jpn" => "Japan",
        "jor" => "Jordan",
        "kaz" => "Kazakhstan",
        "ken" => "Kenya",
        "kir" => "Kiribati",
        "prk" => "Korea (North Korea)",
        "kor" => "Korea (South Korea)",
        "kwt" => "Kuwait",
        "kgz" => "Kyrgyzstan",
        "lao" => "Laos",
        "lva" => "Latvia",
        "lbn" => "Lebanon",
        "lso" => "Lesotho",
        "lbr" => "Liberia",
        "lby" => "Libya",
        "lie" => "Liechtenstein",
        "ltu" => "Lithuania",
        "lux" => "Luxembourg",
        "mkd" => "Macedonia",
        "mdg" => "Madagascar",
        "mwi" => "Malawi",
        "mys" => "Malaysia",
        "mdv" => "Maldives",
        "mli" => "Mali",
        "mlt" => "Malta",
        "mhl" => "Marshall Islands",
        "mrt" => "Mauritania",
        "mus" => "Mauritius",
        "mex" => "Mexico",
        "fsm" => "Micronesia",
        "mda" => "Moldova",
        "mco" => "Monaco",
        "mng" => "Mongolia",
        "mne" => "Montenegro",
        "mar" => "Morocco",
        "moz" => "Mozambique",
        "mmr" => "Myanmar (Burma)",
        "nam" => "Namibia",
        "nru" => "Nauru",
        "npl" => "Nepal",
        "nld" => "Netherlands",
        "nzl" => "New Zealand",
        "nic" => "Nicaragua",
        "ner" => "Niger",
        "nga" => "Nigeria",
        "nor" => "Norway",
        "omn" => "Oman",
        "pak" => "Pakistan",
        "plw" => "Palau",
        "pan" => "Panama",
        "png" => "Papua New Guinea",
        "pry" => "Paraguay",
        "per" => "Peru",
        "phl" => "Philippines",
        "pol" => "Poland",
        "prt" => "Portugal",
        "qat" => "Qatar",
        "rou" => "Romania",
        "rus" => "Russia",
        "rwa" => "Rwanda",
        "kna" => "Saint Kitts and Nevis",
        "lca" => "Saint Lucia",
        "vct" => "Saint Vincent and the Grenadines",
        "wsm" => "Samoa",
        "smr" => "San Marino",
        "stp" => "Sao Tome and Principe",
        "sau" => "Saudi Arabia",
        "sen" => "Senegal",
        "srb" => "Serbia",
        "syc" => "Seychelles",
        "sle" => "Sierra Leone",
        "sgp" => "Singapore",
        "svk" => "Slovakia",
        "svn" => "Slovenia",
        "slb" => "Solomon Islands",
        "som" => "Somalia",
        "zaf" => "South Africa",
        "esp" => "Spain",
        "lka" => "Sri Lanka",
        "sdn" => "Sudan",
        "sur" => "Suriname",
        "swz" => "Swaziland",
        "swe" => "Sweden",
        "che" => "Switzerland",
        "syr" => "Syria",
        "tjk" => "Tajikistan",
        "tza" => "Tanzania",
        "tha" => "Thailand",
        "tls" => "Timor-Leste (East Timor)",
        "tgo" => "Togo",
        "ton" => "Tonga",
        "tto" => "Trinidad and Tobago",
        "tun" => "Tunisia",
        "tur" => "Turkey",
        "tkm" => "Turkmenistan",
        "tuv" => "Tuvalu",
        "uga" => "Uganda",
        "ukr" => "Ukraine",
        "are" => "United Arab Emirates",
        "gbr" => "United Kingdom",
        "usa" => "United States",
        "ury" => "Uruguay",
        "uzb" => "Uzbekistan",
        "vut" => "Vanuatu",
        "vat" => "Vatican City",
        "ven" => "Venezuela",
        "vnm" => "Vietnam",
        "yem" => "Yemen",
        "zmb" => "Zambia",
        "zwe" => "Zimbabwe",
        "geo2" => "Abkhazia",
        "twn" => "Taiwan",
        "aze2" => "Nagorno-Karabakh",
        "cyp2" => "Northern Cyprus",
        "mda2" => "Pridnestrovie (Transnistria)",
        "som2" => "Somaliland",
        "geo3" => "South Ossetia",
        "bvt" => "Bouvet Island",
        "cok" => "Cook Islands",
        "niu" => "Niue",
        "tkl" => "Tokelau",
        "ggy" => "Guernsey",
        "aus2" => "Ashmore and Cartier Islands",
        "cxr" => "Christmas Island",
        "cck" => "Cocos (Keeling) Islands",
        "aus3" => "Coral Sea Islands",
        "hmd" => "Heard Island and McDonald Islands",
        "nfk" => "Norfolk Island",
        "ncl" => "New Caledonia",
        "pyf" => "French Polynesia",
        "myt" => "Mayotte",
        "glp" => "Saint Barthelemy",
        "glp2" => "Saint Martin",
        "spm" => "Saint Pierre and Miquelon",
        "wlf" => "Wallis and Futuna",
        "atf" => "French Southern and Antarctic Lands",
        "pyf2" => "Clipperton Island",
        "imn" => "Isle of Man",
        "jey" => "Jersey",
        "aia" => "Anguilla",
        "bmu" => "Bermuda",
        "iot" => "British Indian Ocean Territory",
        "vgb" => "British Virgin Islands",
        "cym" => "Cayman Islands",
        "flk" => "Falkland Islands (Islas Malvinas)",
        "gib" => "Gibraltar",
        "msr" => "Montserrat",
        "pcn" => "Pitcairn Islands",
        "shn" => "Saint Helena",
        "sgs" => "South Georgia and the South Sandwich Islands",
        "tca" => "Turks and Caicos Islands",
        "mnp" => "Northern Mariana Islands",
        "pri" => "Puerto Rico",
        "asm" => "American Samoa",
        "umi" => "Baker Island",
        "gum" => "Guam",
        "umi2" => "Howland Island",
        "umi3" => "Jarvis Island",
        "umi4" => "Johnston Atoll",
        "umi5" => "Kingman Reef",
        "umi6" => "Midway Islands",
        "umi7" => "Navassa Island",
        "umi8" => "Palmyra Atoll",
        "vir" => "U.S. Virgin Islands",
        "umi9" => "Wake Island",
        "hkg" => "Hong Kong",
        "mac" => "Macau",
        "fro" => "Faroe Islands",
        "grl" => "Greenland",
        "guf" => "French Guiana",
        "glp3" => "Guadeloupe",
        "mtq" => "Martinique",
        "reu" => "Reunion",
        "ala" => "Aland",
        "abw" => "Aruba",
        "ant" => "Netherlands Antilles",
        "sjm" => "Svalbard",
        "asc" => "Ascension",
        "taa" => "Tristan da Cunha",
        "ata" => "Antarctica",
        "scg" => "Kosovo",
        "pse" => "Palestinian Territories (Gaza Strip and West Bank)",
        "esh" => "Western Sahara",
        "ata2" => "Australian Antarctic Territory",
        "ata3" => "Ross Dependency",
        "ata4" => "Peter I Island",
        "ata5" => "Queen Maud Land",
        "ata6" => "British Antarctic Territory"
    );
    foreach($country_array as $abbr => $name)
        {
            if(!get_term_by('name', ucwords(strtolower($name)), 'label_country'))
                wp_insert_term(ucwords(strtolower($name)), 'label_country');
        }
}