Basic PHP Country List Example using PostCoder Web. Find out more at - http://developers.alliescomputing.com/postcoder-web-api/geocoding/countries

country-list.php

<?php

	// Insert your PostCoder Web API Key here 
	// Sign up for free at www.alliescomputing.com/postcoder/sign-up
	$pcw_api_key = "YOUR-API-KEY-HERE";

	// URL we are calling with API key and url encoded postcode
	$pcw_country_url = "http://ws.postcoder.com/pcw/". $pcw_api_key ."/country";

	// Get and JSON decode the response from the service
	$response = json_decode(file_get_contents($pcw_country_url));
	
	// Basic display HTML below, using foreach
?>
<select>
	<option>Select country...</option>
	<?php foreach ($response as $country) : ?>
	<option value="<?= $country->iso2 ?>"><?= $country->countryname ?></option>
	<?php endforeach; ?>
</select>