Rumah >pembangunan bahagian belakang >tutorial php >Kursus ranap PHP: Penukar Mata Wang Mudah
Alat Penukar Mata Wang berasaskan PHP yang membolehkan pengguna menukar mata wang menggunakan kadar pertukaran masa nyata yang diambil daripada API luaran. Alat ini dibina dengan PHP, HTML, jQuery, AJAX, JSON, Bootstrap, CSS dan MySQL. Aplikasi ini direka untuk menyediakan penukaran mata wang yang tepat dan memaparkan hasil dalam antara muka yang mesra pengguna.
Topik: php, mysql, blog, ajax, bootstrap, jquery, css, penukaran mata wang, integrasi api luaran, integrasi api
simple-currency-converter/ │ ├── index.html ├── db/ │ └── database.sql ├── include/ │ ├── config.sample.php │ └── db.php ├── assets/ │ ├── css/ │ │ └── style.css │ └── js/ │ │ └── script.js ├── src/ │ ├── fetch-rates.php │ ├── convert.php │ └── get-currencies.php ├── README.md └── .gitignore
db/database.sql:
CREATE TABLE `exchange_rates` ( `id` int(11) NOT NULL AUTO_INCREMENT, `currency` varchar(3) NOT NULL, `rate` decimal(10, 4) NOT NULL, `timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; CREATE TABLE currencies ( id INT AUTO_INCREMENT PRIMARY KEY, code VARCHAR(3) NOT NULL, name VARCHAR(50) NOT NULL ); INSERT INTO currencies (code, name) VALUES ('USD', 'United States Dollar'), ('EUR', 'Euro'), ('GBP', 'British Pound'), ('JPY', 'Japanese Yen'), ('BDT', 'Bangladesh Taka'), ('AUD', 'Australian Dollar');
Tetapan konfigurasi (include/config.sample.php)
<?php // Database configuration define('DB_HOST', 'localhost'); // Database host define('DB_NAME', 'currency_converter'); // Database name define('DB_USER', 'root'); // Change if necessary define('DB_PASS', ''); // Change if necessary // API configuration define('API_URL', 'https://api.exchangerate-api.com/v4/latest/'); define('API_KEY', 'your_api_key_here'); ?>
Mewujudkan sambungan pangkalan data (termasuk/db.php)
<?php include 'db.php'; // Database configuration $dsn = 'mysql:host='.DB_HOST.';dbname='.DB_NAME; $options = [ PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC, PDO::ATTR_EMULATE_PREPARES => false, ]; // Create a new PDO instance try { $pdo = new PDO($dsn, DB_USER, DB_PASS, $options); $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); // Set error mode to exception } catch (PDOException $e) { echo 'Connection failed: ' . $e->getMessage(); // Display error message if connection fails } ?>
Struktur HTML (index.html)
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Currency Converter</title> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css"> <link rel="stylesheet" href="assets/css/styles.css"> </head> <body> <div class="container"> <h2 class="text-center">Currency Converter</h2> <form id="currency-form"> <div class="form-group"> <label for="amount">Amount:</label> <input type="number" class="form-control" id="amount" placeholder="Enter amount" required> </div> <div class="form-group"> <label for="from_currency">From:</label> <select class="form-control" id="from_currency"> <!-- Options will be loaded dynamically --> </select> </div> <div class="form-group"> <label for="to_currency">To:</label> <select class="form-control" id="to_currency"> <!-- Options will be loaded dynamically --> </select> </div> <button type="submit" class="btn btn-primary">Convert</button> </form> <div id="result" class="alert alert-success" style="display:none;"></div> </div> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script> <script src="assets/js/script.js"></script> </body> </html>
Pengendalian AJAX (aset/js/script.js)
$(document).ready(function() { // Fetch exchange rates and populate the select options $.ajax({ url: 'src/fetch-rates.php', method: 'GET', dataType: 'json', success: function(data) { if (data.status === 'success') { populateCurrencyOptions(); } } }); function populateCurrencyOptions() { $.ajax({ url: 'src/get-currencies.php', method: 'GET', dataType: 'json', success: function(data) { if (data.status === 'success') { var options = ''; console.log(data.currencies) $.each(data.currencies, function(index, currency) { options += '<option value="' + currency.code + '">' + currency.name + '</option>'; }); $('#from_currency, #to_currency').html(options); } } }); } // Handle form submission $('#currency-form').on('submit', function(e) { e.preventDefault(); var amount = $('#amount').val(); var fromCurrency = $('#from_currency').val(); var toCurrency = $('#to_currency').val(); $.ajax({ url: 'src/convert.php', method: 'POST', data: { amount: amount, from_currency: fromCurrency, to_currency: toCurrency }, dataType: 'json', success: function(data) { if (data.status === 'success') { $('#result').html('Converted Amount: ' + data.converted_amount).show(); } else { $('#result').html(data.message).show(); } } }); }); });
Penjelasan:
Ambil Kadar Pertukaran (src/fetch-rates.php)
<?php require '../include/db.php'; // Fetch exchange rates from the external API $apiUrl = API_URL . "USD"; // Replace with your API endpoint $response = file_get_contents($apiUrl); $data = json_decode($response, true); if ($data) { // Clear existing rates $stmt = $pdo->prepare("TRUNCATE TABLE exchange_rates"); $stmt->execute(); // Insert new rates $stmt = $pdo->prepare("INSERT INTO exchange_rates (currency, rate) VALUES (:currency, :rate)"); foreach ($data['rates'] as $currency => $rate) { $stmt->execute(['currency' => $currency, 'rate' => $rate]); } echo json_encode(['status' => 'success', 'message' => 'Exchange rates updated successfully.']); } else { echo json_encode(['status' => 'error', 'message' => 'Failed to fetch exchange rates.']); } ?>
Penjelasan:
Logik Penukaran Mata Wang (src/convert.php)
<?php require '../include/db.php'; $amount = $_POST['amount']; $fromCurrency = $_POST['from_currency']; $toCurrency = $_POST['to_currency']; // Fetch the exchange rate from the database $stmt = $pdo->prepare("SELECT rate FROM exchange_rates WHERE currency = :currency"); $stmt->execute(['currency' => $fromCurrency]); $fromRate = $stmt->fetchColumn(); $stmt->execute(['currency' => $toCurrency]); $toRate = $stmt->fetchColumn(); if ($fromRate && $toRate) { // Convert the amount $convertedAmount = ($amount / $fromRate) * $toRate; echo json_encode(['status' => 'success', 'converted_amount' => number_format($convertedAmount, 2)]); } else { echo json_encode(['status' => 'error', 'message' => 'Conversion failed.']); } ?>
Penjelasan:
Nama dan kod Mata Wang (src/get-currencies.php)
<?php require '../include/db.php'; $stmt = $pdo->query('SELECT code, name FROM currencies'); $data = []; while ($row = $stmt->fetch()) { $data[] = ['code' => $row['code'], 'name' => $row['name']]; } echo json_encode(['status' => 'success', 'currencies' => $data]); ?>
Penjelasan:
Penggayaan CSS (aset/css/style.css)
body { padding-top: 50px; } .container { max-width: 600px; margin: 0 auto; }
Persediaan ini menyediakan alat penukar mata wang asas tetapi berfungsi dengan ulasan dan penjelasan terperinci. Pastikan anda melaraskan URL API dan tetapan pangkalan data mengikut keperluan anda. Untuk kegunaan dunia sebenar, anda juga mungkin mahu menambah pengendalian ralat dan langkah keselamatan.
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