How to setup currency conversion in PHP website

Setting up currency conversion in a PHP website requires a few steps. Here’s a general outline of how to do it:

  1. Choose a currency exchange rate provider: You will need to choose a reliable currency exchange rate provider, such as Open Exchange Rates,, or CurrencyLayer. These providers offer APIs that you can use to fetch the current exchange rates.
  2. Register and obtain an API key: Once you have chosen a provider, you will need to register for an account and obtain an API key. The API key is required to access the provider’s API.
  3. Install a PHP library for your chosen provider: Most currency exchange rate providers offer PHP libraries that simplify the process of accessing their API. You will need to install the library for your chosen provider.
  4. Fetch the exchange rate data: Use the PHP library to fetch the current exchange rate data for the currencies you want to convert.
  5. Perform the currency conversion: Use the exchange rate data to perform the currency conversion. You can either use a pre-built function or write your own function to do the conversion.

Here’s a sample code snippet that demonstrates how to convert USD to EUR using the Open Exchange Rates API:

// include the Open Exchange Rates PHP library
require_once 'path/to/openexchangerates.php';

// set your API key
$api_key = 'YOUR_API_KEY';

// create a new instance of the Open Exchange Rates class
$oxr = new OpenExchangeRates($api_key);

// get the current exchange rate data
$rates = $oxr->latest();

// define the currencies you want to convert
$from_currency = 'USD';
$to_currency = 'EUR';

// get the exchange rate for the currencies
$exchange_rate = $rates[$to_currency] / $rates[$from_currency];

// define the amount you want to convert
$amount = 100;

// perform the currency conversion
$converted_amount = $amount * $exchange_rate;

// output the result
echo $amount . ' ' . $from_currency . ' = ' . $converted_amount . ' ' . $to_currency;

Note that this is just a simple example, and there are many factors to consider when performing currency conversions in a real-world scenario. For example, you may need to round the converted amount to a certain number of decimal places, or handle errors that may occur when accessing the exchange rate provider’s API.