Here is the PHP code, you can use it if you need it, the code courtesy is one of my valued client.
function en_country_to_no_country_code($country)
{
$countries = array(
'Afghanistan' => 'Afghanistan',
'Ålandsøyene' => 'Aland Islands',
'Albania' => 'Albania',
'Algerie' => 'Algeria',
'Amerikansk Samoa' => 'American Samoa',
'Andorra' => 'Andorra',
'Angola' => 'Angola',
'Anguilla' => 'Anguilla',
'Antarktis' => 'Antarctica',
'Antigua og Barbuda' => 'Antigua And Barbuda',
'Argentina' => 'Argentina',
'Armenia' => 'Armenia',
'Aruba' => 'Aruba',
'Australia' => 'Australia',
'Østerrike' => 'Austria',
'Aserbajdsjan' => 'Azerbaijan',
'Bahamas' => 'Bahamas',
'Bahrain' => 'Bahrain',
'Bangladesh' => 'Bangladesh',
'Barbados' => 'Barbados',
'Hviterussland' => 'Belarus',
'Belgia' => 'Belgium',
'Belize' => 'Belize',
'Benin' => 'Benin',
'Bermuda' => 'Bermuda',
'Bhutan' => 'Bhutan',
'Bolivia' => 'Bolivia',
'Bosnia-Hertsegovina' => 'Bosnia And Herzegovina',
'Botswana' => 'Botswana',
'Bouvetøya' => 'Bouvet Island',
'Brasil' => 'Brazil',
'Britisk territorium i det indiske hav' => 'British Indian Ocean Territory',
'Brunei Darussalam' => 'Brunei Darussalam',
'Bulgaria' => 'Bulgaria',
'Burkina Faso' => 'Burkina Faso',
'Burundi' => 'Burundi',
'Kambodsja' => 'Cambodia',
'Kamerun' => 'Cameroon',
'Canada' => 'Canada',
'Kapp Verde' => 'Cape Verde',
'Caymanøyene' => 'Cayman Islands',
'Den sentralafrikanske republikk' => 'Central African Republic',
'Tsjad' => 'Chad',
'Chile' => 'Chile',
'Kina' => 'China',
'Juleøya' => 'Christmas Island',
'Kokosøyene (Keeling)' => 'Cocos (Keeling) Islands',
'Colombia' => 'Colombia',
'Komorene' => 'Comoros',
'Kongo' => 'Congo',
'Kongo, Den demokratiske republikken' => 'Congo, Democratic Republic',
'Cookøyene' => 'Cook Islands',
'Costa Rica' => 'Costa Rica',
'Cote D\'Ivoire' => 'Cote D\'Ivoire',
'Kroatia' => 'Croatia',
'Cuba' => 'Cuba',
'Kypros' => 'Cyprus',
'Tsjekkia' => 'Czech Republic',
'Danmark' => 'Denmark',
'Djibouti' => 'Djibouti',
'Dominica' => 'Dominica',
'Den dominikanske republikk' => 'Dominican Republic',
'Ecuador' => 'Ecuador',
'Egypt' => 'Egypt',
'El Salvador' => 'El Salvador',
'Ekvatorial-Guinea' => 'Equatorial Guinea',
'Eritrea' => 'Eritrea',
'Estland' => 'Estonia',
'Etiopia' => 'Ethiopia',
'Falklandsøyene (Malvinas)' => 'Falkland Islands (Malvinas)',
'Færøyene' => 'Faroe Islands',
'Fiji' => 'Fiji',
'Finland' => 'Finland',
'Frankrike' => 'France',
'Fransk Guyana' => 'French Guiana',
'Fransk Polynesia' => 'French Polynesia',
'Franske sørlige territorier' => 'French Southern Territories',
'Gabon' => 'Gabon',
'Gambia' => 'Gambia',
'Georgia' => 'Georgia',
'Tyskland' => 'Germany',
'Ghana' => 'Ghana',
'Gibraltar' => 'Gibraltar',
'Hellas' => 'Greece',
'Grønland' => 'Greenland',
'Grenada' => 'Grenada',
'Guadeloupe' => 'Guadeloupe',
'Guam' => 'Guam',
'Guatemala' => 'Guatemala',
'Guernsey' => 'Guernsey',
'Guinea' => 'Guinea',
'Guinea-Bissau' => 'Guinea-Bissau',
'Guyana' => 'Guyana',
'Haiti' => 'Haiti',
'Heard Island og Mcdonald Islands' => 'Heard Island & Mcdonald Islands',
'Holy See(Vatikanstaten)' => 'Holy See (Vatican City State)',
'Honduras' => 'Honduras',
'Hong Kong' => 'Hong Kong',
'Ungarn' => 'Hungary',
'Island' => 'Iceland',
'India' => 'India',
'Indonesia' => 'Indonesia',
'Iran, Islamsk Republikk Av' => 'Iran, Islamic Republic Of',
'Irak' => 'Iraq',
'Irlanti' => 'Ireland',
'Mansaarella' => 'Isle Of Man',
'Israel' => 'Israel',
'Italia' => 'Italy',
'Jamaica' => 'Jamaica',
'Japan' => 'Japan',
'Jersey' => 'Jersey',
'Jordan' => 'Jordan',
'Kazakhstan' => 'Kazakhstan',
'Kenya' => 'Kenya',
'Kiribati' => 'Kiribati',
'Korea' => 'Korea',
'Kuwait' => 'Kuwait',
'Kirgisistan' => 'Kyrgyzstan',
'Lao' => 'Lao',
'Latvia' => 'Latvia',
'Libanon' => 'Lebanon',
'Lesotho' => 'Lesotho',
'Liberia' => 'Liberia',
'Libyske arabiske Jamahiriya' => 'Libyan Arab Jamahiriya',
'Liechtenstein' => 'Liechtenstein',
'Litauen' => 'Lithuania',
'Luxembourg' => 'Luxembourg',
'Macao' => 'Macao',
'Makedonia' => 'Macedonia',
'Madagaskar' => 'Madagascar',
'Malawi' => 'Malawi',
'Malaysia' => 'Malaysia',
'Maldivene' => 'Maldives',
'Mali' => 'Mali',
'Malta' => 'Malta',
'Marshalløyene' => 'Marshall Islands',
'Martinique' => 'Martinique',
'Mauritania' => 'Mauritania',
'Mauritius' => 'Mauritius',
'Mayotte' => 'Mayotte',
'Mexico' => 'Mexico',
'Mikronesia, fødererte stater' => 'Micronesia, Federated States Of',
'Moldova' => 'Moldova',
'Monaco' => 'Monaco',
'Mongolia' => 'Mongolia',
'Montenegro' => 'Montenegro',
'Montserrat' => 'Montserrat',
'Marokko' => 'Morocco',
'Mosambik' => 'Mozambique',
'Myanmar' => 'Myanmar',
'Namibia' => 'Namibia',
'Nauru' => 'Nauru',
'Nepal' => 'Nepal',
'Nederland' => 'Netherlands',
'De nederlandske Antillene' => 'Netherlands Antilles',
'Ny-Caledonia' => 'New Caledonia',
'New Zealand' => 'New Zealand',
'Nicaragua' => 'Nicaragua',
'Niger' => 'Niger',
'Nigeria' => 'Nigeria',
'Niue' => 'Niue',
'Norfolkøya' => 'Norfolk Island',
'Nord-Marianene' => 'Northern Mariana Islands',
'Norge' => 'Norway',
'Oman' => 'Oman',
'Pakistan' => 'Pakistan',
'Palau' => 'Palau',
'Palestinsk territorium, Okkupert' => 'Palestinian Territory, Occupied',
'Panama' => 'Panama',
'Papua Ny-Guinea' => 'Papua New Guinea',
'Paraguay' => 'Paraguay',
'Peru' => 'Peru',
'Filippinene' => 'Philippines',
'Pitcairn' => 'Pitcairn',
'Polen' => 'Poland',
'Portugal' => 'Portugal',
'Puerto Rico' => 'Puerto Rico',
'Qatar' => 'Qatar',
'Gjenforening' => 'Reunion',
'Romania' => 'Romania',
'Russland' => 'Russian Federation',
'Rwanda' => 'Rwanda',
'Saint Barthelemy' => 'Saint Barthelemy',
'Saint Helena' => 'Saint Helena',
'Saint Kitts og Nevis' => 'Saint Kitts And Nevis',
'Saint Lucia' => 'Saint Lucia',
'Sankt Martin' => 'Saint Martin',
'Saint Pierre og Miquelon' => 'Saint Pierre And Miquelon',
'Saint Vincent og Grenadiner' => 'Saint Vincent And Grenadines',
'Samoa' => 'Samoa',
'San Marino' => 'San Marino',
'Sao Tome og Principe' => 'Sao Tome And Principe',
'Saudi-Arabia' => 'Saudi-Arabia',
'Senegal' => 'Senegal',
'Serbia' => 'Serbia',
'Seychellene',
'Sierra Leone' => 'Sierra Leone',
'Singapore' => 'Singapore',
'Slovakia' => 'Slovakia',
'Slovenia' => 'Slovenia',
'Salomonøyene' => 'Solomon Islands',
'Somalia' => 'Somalia',
'Sør-Afrika' => 'South Africa',
'South Georgia og Sandwich Isl.' => 'South Georgia And Sandwich Isl.',
'Spania' => 'Spain',
'Sri Lanka' => 'Sri Lanka',
'Sudan' => 'Sudan',
'Surinam' => 'Suriname',
'Svalbard og Jan Mayen' => 'Svalbard And Jan Mayen',
'Swazimaa' => 'Swaziland',
'Sverige' => 'Sweden',
'Sveits' => 'Switzerland',
'Den Syriske Arabiske Republikken' => 'Syrian Arab Republic',
'Taiwan' => 'Taiwan',
'Tadsjikistan' => 'Tajikistan',
'Tanzania' => 'Tanzania',
'Thailand' => 'Thailand',
'Timor-Leste' => 'Timor-Leste',
'Togo' => 'Togo',
'Tokelau' => 'Tokelau',
'Tonga' => 'Tonga',
'Trinidad og Tobago' => 'Trinidad And Tobago',
'Tunisia' => 'Tunisia',
'Tyrkia' => 'Turkey',
'Turkmenistan' => 'Turkmenistan',
'Turks- og Caicosøyene' => 'Turks And Caicos Islands',
'Tuvalu' => 'Tuvalu',
'Uganda' => 'Uganda',
'Ukraina' => 'Ukraine',
'De forente arabiske emirater' => 'United Arab Emirates',
'Storbritannia' => 'United Kingdom',
'Amerikas forente stater' => 'United States',
'Amerikas forente stater' => 'United States Outlying Islands',
'Uruguay' => 'Uruguay',
'Usbekistan' => 'Uzbekistan',
'Vanuatu' => 'Vanuatu',
'Venezuela' => 'Venezuela',
'Viet Nam' => 'Viet Nam',
'Jomfruøyene, Britisk' => 'Virgin Islands, British',
'Jomfruøyene, USA' => 'Jomfruøyene, USA',
'Wallis og Futuna' => 'Wallis And Futuna',
'Vest-Sahara' => 'Western Sahara',
'Jemen' => 'Yemen',
'Zambia' => 'Zambia',
'Zimbabwe' => 'Zimbabwe',
'NORD-AMERIKA' => 'NORTH AMERICA',
'EUROPA' => 'EUROPE',
'SØR-AMERIKA' => 'SOUTH AMERICA',
'ASIA' => 'ASIA',
'AFRIKA' => 'AFRICA',
'OSEANIA' => 'OCEANIA',
);
// Set ISO
$iso_code = strtolower(array_search(strtolower($country), array_map('strtolower', $countries)));
return $iso_code;
}