我有一系列世界上所有国家:
$countries = array(
"GB" => "United Kingdom",
"US" => "United States",
"AF" => "Afghanistan",
"AL" => "Albania",
"DZ" => "Algeria",
"AS" => "American Samoa",
"AD" => "Andorra",
"AO" => "Angola",
"AI" => "Anguilla",
"AQ" => "Antarctica",
"AG" => "Antigua And Barbuda",
"AR" => "Argentina",
"AM" => "Armenia",
"AW" => "Aruba",
"AU" => "Australia",
"AT" => "Austria",
"AZ" => "Azerbaijan",
"BS" => "Bahamas",
"BH" => "Bahrain",
"BD" => "Bangladesh",
"BB" => "Barbados",
"BY" => "Belarus",
"BE" => "Belgium",
"BZ" => …