A PHP array list of all of the countries.

$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 ";