Another way to get currency from Bloomberg with PHP function without API Key.

function get_currency( $from = null, $to = null )
{
 $get = file_get_contents('https://www.bloomberg.com/markets/api/security/currency/cross-rates/USD,EUR,JPY,GBP,IDR');

 if ( $to && $from ) {
 return json_decode( $get )->data->$from->$to;
 } else if ( $from ) {
 return json_decode( $get )->data->$from;
 } else {
 return json_decode( $get )->data;
 }
}

• Add ISO currency code after cross-rates
• return is array object

For API reference, learn at Blooberg API

Function Snippet by gueprogramer