What are the best practices for storing and updating currency exchange rate data in PHP?

Storing and updating currency exchange rate data in PHP requires a reliable source for the data, a database to store the rates, and a method to regularly update the rates. One approach is to use an API to fetch the latest exchange rates and store them in a database. You can then create a script to periodically update the rates based on the API data. 

// Fetch latest exchange rates from an API
$api_url = 'https://api.exchangerate-api.com/v4/latest/USD';
$data = json_decode(file_get_contents($api_url), true);

// Store the rates in a database
$mysqli = new mysqli('localhost', 'username', 'password', 'database');
foreach ($data['rates'] as $currency => $rate) {
    $query = "INSERT INTO exchange_rates (currency, rate) VALUES ('$currency', $rate)";
    $mysqli->query($query);
}

// Update the rates periodically
// You can set up a cron job to run this script at regular intervals

Keywords

database SQL API cron job caching

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