A function to return a PHP array of ISO2 country codes. I use this a lot for HTML selects

ISO2 Country Codes

<?php

/**
 * An array of countries with ISO2 codes as key
 *
 * @return array
 **/
function getCountries()
{
    $options["AF"] = "Afghanistan";  
    $options["AX"] = "Åland Islands";  
    $options["AL"] = "Albania ";  
    $options["DZ"] = "Algeria ";  
    $options["AS"] = "American Samoa";  
    $options["AD"] = "Andorra";  
    $options["AO"] = "Angola ";
    $options["AI"] = "Anguilla ";
    $options["AQ"] = "Antarctica ";
    $options["AG"] = "Antigua and Barbuda ";
    $options["AR"] = "Argentina";
    $options["AU"] = "Australia ";
    $options["AT"] = "Austria ";
    $options["AZ"] = "Azerbaijan";
    $options["BS"] = "Bahamas ";
    $options["BH"] = "Bahrain ";
    $options["BD"] = "Bangladesh ";
    $options["BB"] = "Barbados ";
    $options["BY"] = "Belarus";
    $options["BE"] = "Belgium ";
    $options["BZ"] = "Belize ";
    $options["BJ"] = "Benin ";
    $options["BM"] = "Bermuda ";
    $options["BT"] = "Bhutan";
    $options["BO"] = "Bolivia ";
    $options["BA"] = "Bosnia and Herzegovina ";
    $options["BW"] = "Botswana ";
    $options["BV"] = "Bouvet Island ";
    $options["BR"] = "Brazil";
    $options["IO"] = "British Indian Ocean Territory ";
    $options["BN"] = "Brunei Darussalam ";
    $options["BG"] = "Bulgaria ";
    $options["BF"] = "Burkina Faso ";
    $options["BI"] = "Burundi";
    $options["KH"] = "Cambodia ";
    $options["CM"] = "Cameroon ";
    $options["CA"] = "Canada ";
    $options["CV"] = "Cape Verde ";
    $options["KY"] = "Cayman Islands ";
    $options["CF"] = "Central African Republic ";
    $options["TD"] = "Chad ";
    $options["CL"] = "Chile ";
    $options["CN"] = "China ";
    $options["CX"] = "Christmas Island";
    $options["CC"] = "Cocos (Keeling) Islands ";
    $options["CO"] = "Colombia ";
    $options["KM"] = "Comoros ";
    $options["CG"] = "Congo ";
    $options["CD"] = "Congo, the Democratic Republic of the";
    $options["CK"] = "Cook Islands ";
    $options["CR"] = "Costa Rica ";
    $options["CI"] = "Côte D'Ivoire";
    $options["HR"] = "Croatia ";
    $options["CU"] = "Cuba ";
    $options["CY"] = "Cyprus ";
    $options["CZ"] = "Czech Republic ";
    $options["DK"] = "Denmark";
    $options["DJ"] = "Djibouti ";
    $options["DM"] = "Dominica ";
    $options["DO"] = "Dominican Republic ";
    $options["EC"] = "Ecuador ";
    $options["EG"] = "Egypt";
    $options["SV"] = "El Salvador ";
    $options["GQ"] = "Equatorial Guinea ";
    $options["ER"] = "Eritrea ";
    $options["EE"] = "Estonia ";
    $options["ET"] = "Ethiopia ";
    $options["FK"] = "Falkland Islands (Malvinas) ";
    $options["FO"] = "Faroe Islands ";
    $options["FJ"] = "Fiji ";
    $options["FI"] = "Finland ";
    $options["FR"] = "France";
    $options["GF"] = "French Guiana ";
    $options["PF"] = "French Polynesia ";
    $options["TF"] = "French Southern Territories ";
    $options["GA"] = "Gabon ";
    $options["GM"] = "Gambia ";
    $options["GE"] = "Georgia ";
    $options["DE"] = "Germany ";
    $options["GH"] = "Ghana ";
    $options["GI"] = "Gibraltar ";
    $options["GR"] = "Greece";
    $options["GL"] = "Greenland ";
    $options["GD"] = "Grenada ";
    $options["GP"] = "Guadeloupe ";
    $options["GU"] = "Guam ";
    $options["GT"] = "Guatemala";
    $options["GG"] = "Guernsey ";
    $options["GN"] = "Guinea ";
    $options["GW"] = "Guinea-Bissau ";
    $options["GY"] = "Guyana ";
    $options["HT"] = "Haiti";
    $options["HM"] = "Heard Island and Mcdonald Islands ";
    $options["VA"] = "Holy See (Vatican City State) ";
    $options["HN"] = "Honduras ";
    $options["HK"] = "Hong Kong ";
    $options["HU"] = "Hungary";
    $options["IS"] = "Iceland ";
    $options["IN"] = "India ";
    $options["ID"] = "Indonesia ";
    $options["IR"] = "Iran, Islamic Republic of ";
    $options["IQ"] = "Iraq ";
    $options["IE"] = "Ireland ";
    $options["IM"] = "Isle of Man ";
    $options["IL"] = "Israel ";
    $options["IT"] = "Italy ";
    $options["JM"] = "Jamaica";
    $options["JP"] = "Japan ";
    $options["JE"] = "Jersey ";
    $options["JO"] = "Jordan ";
    $options["KZ"] = "Kazakhstan ";
    $options["KE"] = "KENYA";
    $options["KI"] = "Kiribati ";
    $options["KP"] = "Korea, Democratic People's Republic of ";
    $options["KR"] = "Korea, Republic of ";
    $options["KW"] = "Kuwait ";
    $options["KG"] = "Kyrgyzstan";
    $options["LA"] = "Lao People's Democratic Republic ";
    $options["LV"] = "Latvia ";
    $options["LB"] = "Lebanon ";
    $options["LS"] = "Lesotho ";
    $options["LR"] = "Liberia";
    $options["LY"] = "Libyan Arab Jamahiriya ";
    $options["LI"] = "Liechtenstein ";
    $options["LT"] = "Lithuania ";
    $options["LU"] = "Luxembourg ";
    $options["MO"] = "Macao";
    $options["MK"] = "Macedonia, the Former Yugoslav Republic of ";
    $options["MG"] = "Madagascar ";
    $options["MW"] = "Malawi ";
    $options["MY"] = "Malaysia ";
    $options["MV"] = "Maldives";
    $options["ML"] = "Mali ";
    $options["MT"] = "Malta ";
    $options["MH"] = "Marshall Islands ";
    $options["MQ"] = "Martinique ";
    $options["MR"] = "Mauritania";
    $options["MU"] = "Mauritius ";
    $options["YT"] = "Mayotte ";
    $options["MX"] = "Mexico ";
    $options["FM"] = "Micronesia, Federated States of ";
    $options["MD"] = "Moldova, Republic of";
    $options["MC"] = "Monaco ";
    $options["MN"] = "Mongolia ";
    $options["ME"] = "Montenegro ";
    $options["MS"] = "Montserrat ";
    $options["MA"] = "Morocco";
    $options["MZ"] = "Mozambique ";
    $options["MM"] = "Myanmar ";
    $options["NA"] = "Namibia ";
    $options["NR"] = "Nauru ";
    $options["NP"] = "Nepal";
    $options["NL"] = "Netherlands ";
    $options["AN"] = "Netherlands Antilles ";
    $options["NC"] = "New Caledonia ";
    $options["NZ"] = "New Zealand ";
    $options["NI"] = "Nicaragua";
    $options["NE"] = "Niger ";
    $options["NG"] = "Nigeria ";
    $options["NU"] = "Niue ";
    $options["NF"] = "Norfolk Island ";
    $options["MP"] = "Northern Mariana Islands";
    $options["NO"] = "Norway ";
    $options["OM"] = "Oman ";
    $options["PK"] = "Pakistan ";
    $options["PW"] = "Palau ";
    $options["PS"] = "Palestinian Territory, Occupied";
    $options["PA"] = "Panama ";
    $options["PG"] = "Papua New Guinea ";
    $options["PY"] = "Paraguay ";
    $options["PE"] = "Peru ";
    $options["PH"] = "Philippines";
    $options["PN"] = "Pitcairn ";
    $options["PL"] = "Poland ";
    $options["PT"] = "Portugal ";
    $options["PR"] = "Puerto Rico ";
    $options["QA"] = "Qatar";
    $options["RE"] = "Réunion ";
    $options["RO"] = "Romania ";
    $options["RU"] = "Russian Federation ";
    $options["RW"] = "Rwanda ";
    $options["SH"] = "Saint Helena";
    $options["KN"] = "Saint Kitts and Nevis ";
    $options["LC"] = "Saint Lucia ";
    $options["PM"] = "Saint Pierre and Miquelon ";
    $options["VC"] = "Saint Vincent and the Grenadines ";
    $options["WS"] = "Samoa";
    $options["SM"] = "San Marino ";
    $options["ST"] = "Sao Tome and Principe ";
    $options["SA"] = "Saudi Arabia ";
    $options["SN"] = "Senegal ";
    $options["RS"] = "Serbia";
    $options["SC"] = "Seychelles ";
    $options["SL"] = "Sierra Leone ";
    $options["SG"] = "Singapore ";
    $options["SK"] = "Slovakia ";
    $options["SI"] = "Slovenia";
    $options["SB"] = "Solomon Islands ";
    $options["SO"] = "Somalia ";
    $options["ZA"] = "South Africa ";
    $options["GS"] = "South Georgia and the South Sandwich Islands ";
    $options["ES"] = "Spain";
    $options["LK"] = "Sri Lanka ";
    $options["SD"] = "Sudan ";
    $options["SR"] = "Suriname ";
    $options["SJ"] = "Svalbard and Jan Mayen ";
    $options["SZ"] = "Swaziland";
    $options["SE"] = "Sweden ";
    $options["CH"] = "Switzerland ";
    $options["SY"] = "Syrian Arab Republic ";
    $options["TW"] = "Taiwan, Province of China ";
    $options["TJ"] = "Tajikistan";
    $options["TZ"] = "Tanzania, United Republic of ";
    $options["TH"] = "Thailand ";
    $options["TL"] = "Timor-Leste ";
    $options["TG"] = "Togo ";
    $options["TK"] = "Tokelau";
    $options["TO"] = "Tonga ";
    $options["TT"] = "Trinidad and Tobago ";
    $options["TN"] = "Tunisia ";
    $options["TR"] = "Turkey ";
    $options["TM"] = "Turkmenistan";
    $options["TC"] = "Turks and Caicos Islands ";
    $options["TV"] = "Tuvalu ";
    $options["UG"] = "Uganda ";
    $options["UA"] = "Ukraine ";
    $options["AE"] = "United Arab Emirates";
    $options["GB"] = "United Kingdom ";
    $options["US"] = "United States ";
    $options["UM"] = "United States Minor Outlying Islands ";
    $options["UY"] = "Uruguay ";
    $options["UZ"] = "Uzbekistan";
    $options["VU"] = "Vanuatu ";
    $options["VA"] = "Vatican City State ";
    $options["VE"] = "Venezuela ";
    $options["VN"] = "Viet Nam ";
    $options["VG"] = "Virgin Islands, British ";
    $options["VI"] = "Virgin Islands, U.S. ";
    $options["WF"] = "Wallis and Futuna";
    $options["EH"] = "Western Sahara ";
    $options["YE"] = "Yemen ";
    $options["CD"] = "Zaire ";
    $options["ZM"] = "Zambia ";
    $options["ZW"] = "Zimbabwe ";
    return $options;
}