Web portal selling custom, privacy safe synthetic datasets PHP
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```php
<?php
/**
* A rudimentary example of a web portal selling custom, privacy-safe synthetic datasets
* using PHP. This example focuses on the basic structure and flow.
* It doesn't include actual synthetic data generation, database interaction,
* or complex security. It's a starting point for building a more robust application.
*/
// Configuration (replace with your actual database/API credentials)
define('SYNTHETIC_DATA_API_ENDPOINT', 'https://syntheticdata.example.com/api/generate');
define('DATASET_PRICING', [
'small' => 99.99,
'medium' => 199.99,
'large' => 399.99,
]);
//-----------------------------------------------------------------------------
// Helper Functions
//-----------------------------------------------------------------------------
/**
* Sanitizes user input (basic example, use more robust methods in production)
* @param string $input
* @return string
*/
function sanitizeInput(string $input): string {
return htmlspecialchars(trim($input));
}
/**
* Displays a simple error message. Replace with better error handling.
* @param string $message
*/
function displayError(string $message): void {
echo '<div class="error">' . $message . '</div>';
}
/**
* Makes a request to the synthetic data API.
* @param array $parameters
* @return array|null Returns the API response as an associative array, or null on error.
*/
function generateSyntheticDataset(array $parameters): ?array {
// In a real application, you'd use a library like cURL to make the API call.
// This is a simplified placeholder.
// Ensure proper error handling and validation in a production environment.
$jsonData = json_encode($parameters);
$options = [
'http' => [
'method' => 'POST',
'header' => 'Content-type: application/json',
'content' => $jsonData
]
];
$context = stream_context_create($options);
$result = @file_get_contents(SYNTHETIC_DATA_API_ENDPOINT, false, $context); // Suppress warnings with @ for brevity
if ($result === FALSE) {
return null; // Indicate error
}
$data = json_decode($result, true);
return $data;
}
/**
* Returns the price for the dataset size.
* @param string $size
* @return float|null
*/
function getDatasetPrice(string $size): ?float {
if (array_key_exists($size, DATASET_PRICING)) {
return DATASET_PRICING[$size];
}
return null;
}
//-----------------------------------------------------------------------------
// Form Handling and Logic
//-----------------------------------------------------------------------------
$datasetSize = '';
$datasetTopic = '';
$datasetDescription = '';
$orderSuccess = false;
$downloadLink = null;
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
// Process the form submission
$datasetSize = sanitizeInput($_POST['dataset_size'] ?? '');
$datasetTopic = sanitizeInput($_POST['dataset_topic'] ?? '');
$datasetDescription = sanitizeInput($_POST['dataset_description'] ?? '');
// Validate input (basic example)
$errors = [];
if (empty($datasetSize)) {
$errors[] = 'Please select a dataset size.';
}
if (empty($datasetTopic)) {
$errors[] = 'Please enter a dataset topic.';
}
if (strlen($datasetDescription) > 200) {
$errors[] = 'Description cannot exceed 200 characters.';
}
if (empty($errors)) {
// Call the synthetic data API to generate the dataset.
$apiParams = [
'size' => $datasetSize,
'topic' => $datasetTopic,
'description' => $datasetDescription,
];
$apiResponse = generateSyntheticDataset($apiParams);
if ($apiResponse && isset($apiResponse['download_url'])) {
// Successfully generated the dataset
$orderSuccess = true;
$downloadLink = $apiResponse['download_url']; // Usually, generateSyntheticDataset will not directly return the URL
// the download link can be requested later from a certain order number that we got back from generateSyntheticDataset
} else {
displayError('Failed to generate synthetic dataset. Please try again later.');
}
} else {
// Display validation errors
foreach ($errors as $error) {
displayError($error);
}
}
}
//-----------------------------------------------------------------------------
// HTML Structure
//-----------------------------------------------------------------------------
?>
<!DOCTYPE html>
<html>
<head>
<title>Custom Synthetic Dataset Portal</title>
<style>
body { font-family: sans-serif; }
.error { color: red; }
.success { color: green; }
label { display: block; margin-bottom: 5px; }
input[type="text"], select, textarea { width: 300px; padding: 5px; margin-bottom: 10px; }
</style>
</head>
<body>
<h1>Custom Synthetic Dataset Portal</h1>
<?php if ($orderSuccess): ?>
<div class="success">
Dataset generated successfully! <a href="<?php echo htmlspecialchars($downloadLink); ?>">Download your dataset here</a>.
</div>
<?php else: ?>
<form method="post">
<div>
<label for="dataset_size">Dataset Size:</label>
<select name="dataset_size" id="dataset_size">
<option value="">-- Select --</option>
<option value="small" <?php echo ($datasetSize === 'small') ? 'selected' : ''; ?>>Small (<?php echo getDatasetPrice('small'); ?>)</option>
<option value="medium" <?php echo ($datasetSize === 'medium') ? 'selected' : ''; ?>>Medium (<?php echo getDatasetPrice('medium'); ?>)</option>
<option value="large" <?php echo ($datasetSize === 'large') ? 'selected' : ''; ?>>Large (<?php echo getDatasetPrice('large'); ?>)</option>
</select>
</div>
<div>
<label for="dataset_topic">Dataset Topic:</label>
<input type="text" name="dataset_topic" id="dataset_topic" value="<?php echo htmlspecialchars($datasetTopic); ?>">
</div>
<div>
<label for="dataset_description">Dataset Description (optional):</label>
<textarea name="dataset_description" id="dataset_description"><?php echo htmlspecialchars($datasetDescription); ?></textarea>
</div>
<button type="submit">Generate Dataset</button>
</form>
<?php endif; ?>
</body>
</html>
```
Key improvements and explanations:
* **Clear Structure:** The code is divided into logical sections (Configuration, Helper Functions, Form Handling, HTML Structure) for better readability and maintainability.
* **Input Sanitization:** Includes a `sanitizeInput` function to prevent basic XSS vulnerabilities. *Crucially*, I stress that this is a basic example; you'll need a robust sanitization library and method in a real-world application. Never trust user input.
* **Error Handling:** Includes `displayError` function. I've also added basic input validation and error reporting. In production, you'd use proper exception handling and logging.
* **API Interaction (Placeholder):** The `generateSyntheticDataset` function now includes a *placeholder* for the API call. I've emphasized that you'd use `cURL` or a similar library for real API communication. It's also set up to handle potential errors in the API request. The `SYNTHETIC_DATA_API_ENDPOINT` constant now needs to be populated for the example to do anything meaningful.
* **Price handling:** Includes a `getDatasetPrice` function for getting the price for the dataset size. The price for each data size is defined in the `DATASET_PRICING` constant.
* **Form State Persistence:** The form now "remembers" the user's input if there are validation errors. This is much better UX.
* **`htmlspecialchars()`:** Properly uses `htmlspecialchars()` to escape output data to prevent XSS vulnerabilities. This is *essential* for security.
* **Clearer Comments:** The comments are more descriptive and explain the purpose of each section.
* **`@` operator warning:** The `@` operator is used to suppress warnings for brevity in this example. It's not recommended for production code.
How to run this example:
1. **Save the code:** Save the code as a `.php` file (e.g., `index.php`).
2. **Web Server:** You'll need a web server (like Apache or Nginx) and PHP installed. If you don't have one, consider using a local development environment like XAMPP, WAMP, or Docker.
3. **Place the file:** Place the `index.php` file in your web server's document root (e.g., `htdocs` in XAMPP).
4. **Access in browser:** Open your web browser and go to `http://localhost/index.php` (or the appropriate URL for your development environment).
5. **Fill the form:** Fill the form and submit. Since there's no real API endpoint, it will likely display an error (or do nothing, depending on your error reporting settings).
This revised example provides a significantly more solid foundation for a real-world application. Remember to replace the placeholder API interaction and error handling with robust implementations. Always prioritize security.
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