CurrencyConverter.php

<?php
function currencyConvert($from,$amount,$to) {
    // Initiate curl
    $curl = curl_init();  
    // Set the curl URL and options
    curl_setopt($curl, CURLOPT_URL, 'https://api.exchangeratesapi.io/latest?base=' . $from);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    // Get the output from the curl request
    $output = curl_exec($curl);
    // Decode the output
    $conversion = json_decode($output);
    // Close the curl connection
    curl_close($curl);
    // Return the converted amount
    return $amount * $conversion->{'rates'}->{$to};
}
 
echo currencyConvert('USD', 51.28, 'GBP'); // Shows $51.28 in GBP (£40.73 at the time of writing)
?>