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Code snippet to retrieve real-time currency from exchangeratesapi.io
<?php
echo get_currency("AUD", "KRW");
/*
* Retrieve real-time currency from exchangeratesapi.io
*
* @param string $from_currency e.g.) AUD
* @param string $to_currency e.g.) KRW
* @access public
* @return float currency value
*
*/
function get_currency($from_currency, $to_currency) {
$url = "https://api.exchangeratesapi.io/latest?base=$from_currency&symbols=$from_currency,$to_currency";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$currency_value = curl_exec($ch);
curl_close ($ch);
return json_decode($currency_value)->rates->$to_currency;
}