Here is a Currency Converter Tool using PHP that allows users to convert between two currencies using exchange rates from an external API like exchangerate-api.com.

1. PHP Code for Currency Converter Tool

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Simple Currency Converter Tool to convert between currencies.">
    <meta name="keywords" content="Currency Converter, PHP, Currency Exchange">
    <title>Currency Converter Tool</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            background-color: #f4f4f4;
            margin: 0;
            padding: 20px;
        }
        .container {
            max-width: 600px;
            margin: 0 auto;
            padding: 20px;
            background-color: #fff;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
        }
        h1 {
            text-align: center;
        }
        form {
            margin-top: 20px;
        }
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
        }
        input[type="text"], select, input[type="submit"] {
            width: 100%;
            padding: 10px;
            margin-bottom: 20px;
            border: 1px solid #ccc;
            border-radius: 5px;
        }
        input[type="submit"] {
            background-color: #007bff;
            color: #fff;
            cursor: pointer;
        }
        .result {
            font-size: 18px;
            text-align: center;
            color: #333;
        }
        .error {
            color: red;
            text-align: center;
        }
    </style>
</head>
<body>

<div class="container">
    <h1>Currency Converter Tool</h1>
    <p>Enter the amount and select currencies to convert.</p>

    <form method="post">
        <label for="amount">Amount:</label>
        <input type="text" id="amount" name="amount" placeholder="Enter amount" required>

        <label for="from_currency">From:</label>
        <select id="from_currency" name="from_currency" required>
            <option value="USD">USD - United States Dollar</option>
            <option value="EUR">EUR - Euro</option>
            <option value="GBP">GBP - British Pound</option>
            <option value="INR">INR - Indian Rupee</option>
            <option value="PKR">PKR - Pakistani Rupee</option>
            <!-- Add more currencies as needed -->
        </select>

        <label for="to_currency">To:</label>
        <select id="to_currency" name="to_currency" required>
            <option value="USD">USD - United States Dollar</option>
            <option value="EUR">EUR - Euro</option>
            <option value="GBP">GBP - British Pound</option>
            <option value="INR">INR - Indian Rupee</option>
            <option value="PKR">PKR - Pakistani Rupee</option>
            <!-- Add more currencies as needed -->
        </select>

        <input type="submit" name="convert_currency" value="Convert">
    </form>

    <?php
    if (isset($_POST['convert_currency'])) {
        $amount = $_POST['amount'];
        $from_currency = $_POST['from_currency'];
        $to_currency = $_POST['to_currency'];

        // Validate input
        if (!is_numeric($amount) || $amount <= 0) {
            echo "<div class='error'>Please enter a valid amount.</div>";
        } else {
            // API URL for currency conversion
            $api_url = "https://v6.exchangerate-api.com/v6/YOUR-API-KEY/latest/{$from_currency}";

            // Get the conversion rates
            $response = @file_get_contents($api_url);
            if ($response) {
                $data = json_decode($response, true);

                // Check if the API call was successful
                if ($data['result'] == 'success') {
                    // Get the exchange rate for the selected currency
                    $conversion_rate = $data['conversion_rates'][$to_currency];

                    // Calculate the converted amount
                    $converted_amount = $amount * $conversion_rate;

                    // Display the result
                    echo "<div class='result'>";
                    echo "<p><strong>Converted Amount:</strong> $converted_amount $to_currency</p>";
                    echo "</div>";
                } else {
                    echo "<div class='error'>Unable to fetch currency data. Please try again later.</div>";
                }
            } else {
                echo "<div class='error'>Error fetching data from the API. Please check your connection or try again later.</div>";
            }
        }
    }
    ?>
</div>

</body>
</html>

2. How the Currency Converter Tool Works

  • Input:
  • Users enter the amount they want to convert and select the currencies they want to convert from and to.
  • Processing:
  • The PHP script calls an external API (e.g., exchangerate-api.com) to get the exchange rates. You need to replace YOUR-API-KEY with a valid API key from the service.
  • Output:
  • Displays the converted amount based on the current exchange rates.
See also  How to create & desing Loan calculator ?

3. How to Get an API Key for Exchange Rates

  1. Visit the ExchangeRate-API website and sign up for a free account.
  2. You will receive an API key that you can use in the URL for fetching exchange rates.

Example URL with API Key:

https://v6.exchangerate-api.com/v6/YOUR-API-KEY/latest/USD

4. Integrating the Currency Converter Tool into WordPress

Method 1: Creating a Custom Plugin

Steps:
  1. Create a Plugin Folder:
  • Go to /wp-content/plugins/ and create a folder called currency-converter-tool.
  1. Create the Plugin File:
  • Inside the currency-converter-tool folder, create a file named currency-converter.php.
  • Add the following PHP code:
<?php
/*
Plugin Name: Currency Converter Tool
Description: A simple tool to convert currencies using real-time exchange rates.
Version: 1.0
Author: Your Name
*/

// Function to display the Currency Converter Tool
function currency_converter_tool_shortcode() {
    ob_start(); // Start output buffering
    ?>

    <div class="container">
        <h1>Currency Converter Tool</h1>
        <p>Enter the amount and select currencies to convert.</p>

        <form method="post">
            <label for="amount">Amount:</label>
            <input type="text" id="amount" name="amount" placeholder="Enter amount" required>

            <label for="from_currency">From:</label>
            <select id="from_currency" name="from_currency" required>
                <option value="USD">USD - United States Dollar</option>
                <option value="EUR">EUR - Euro</option>
                <option value="GBP">GBP - British Pound</option>
                <option value="INR">INR - Indian Rupee</option>
                <option value="PKR">PKR - Pakistani Rupee</option>
                <!-- Add more currencies as needed -->
            </select>

            <label for="to_currency">To:</label>
            <select id="to_currency" name="to_currency" required>
                <option value="USD">USD - United States Dollar</option>
                <option value="EUR">EUR - Euro</option>
                <option value="GBP">GBP - British Pound</option>
                <option value="INR">INR - Indian Rupee</option>
                <option value="PKR">PKR - Pakistani Rupee</option>
                <!-- Add more currencies as needed -->
            </select>

            <input type="submit" name="convert_currency" value="Convert">
        </form>

        <?php
        if (isset($_POST['convert_currency'])) {
            $amount = $_POST['amount'];
            $from_currency = $_POST['from_currency'];
            $to_currency = $_POST['to_currency'];

            // Validate input
            if (!is_numeric($amount) || $amount <= 0) {
                echo "<div class='error'>Please enter a valid amount.</div>";
            } else {
                // API URL for currency conversion
                $api_url = "https://v6.exchangerate-api.com/v6/YOUR-API-KEY/latest/{$from_currency}";

                // Get the conversion rates
                $response = @file_get_contents($api_url);
                if ($response) {
                    $data = json_decode($response, true);

                    // Check if the API call was successful
                    if ($data['result'] == 'success') {
                        // Get the exchange rate for the selected currency
                        $conversion_rate = $data['conversion_rates'][$to_currency];

                        // Calculate the converted amount
                        $converted_amount = $amount * $conversion_rate;

                        // Display the result
                        echo "<div class='result'>";
                        echo "<p><strong>Converted Amount:</strong> $converted_amount $to_currency</p>";
                        echo

 "</div>";
                    } else {
                        echo "<div class='error'>Unable to fetch currency data. Please try again later.</div>";
                    }
                } else {
                    echo "<div class='error'>Error fetching data from the API. Please check your connection or try again later.</div>";
                }
            }
        }
        ?>
    </div>

    <?php
    return ob_get_clean(); // Return the output
}

// Register the shortcode [currency_converter_tool]
add_shortcode('currency_converter_tool', 'currency_converter_tool_shortcode');
?>
  1. Activate the Plugin:
  • Go to the WordPress Admin Dashboard > Plugins and activate the Currency Converter Tool plugin.
  1. Add the Shortcode:
  • To display the tool on any post or page, use the shortcode:
   [currency_converter_tool]

This Currency Converter Tool is simple and useful for anyone looking to quickly convert currencies.

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