What are the potential pitfalls to watch out for when developing a product price configurator in PHP for practice purposes?

Issue: One potential pitfall when developing a product price configurator in PHP is not properly sanitizing user input, which can leave the application vulnerable to SQL injection attacks. To prevent this, it's important to always sanitize and validate any user input before using it in database queries. 

// Sanitize and validate user input before using it in database queries
$input = $_POST['user_input'];
$sanitized_input = filter_var($input, FILTER_SANITIZE_STRING);

// Use prepared statements to prevent SQL injection
$stmt = $pdo->prepare("SELECT * FROM products WHERE name = :name");
$stmt->bindParam(':name', $sanitized_input);
$stmt->execute();
```

Another potential pitfall is not properly handling errors and exceptions, which can lead to unexpected behavior or security vulnerabilities. It's crucial to implement error handling mechanisms to gracefully handle any errors that may occur during the execution of the application.

```php
// Implement error handling mechanisms to gracefully handle errors
try {
    // Code that may throw exceptions
} catch (Exception $e) {
    // Handle exceptions
    echo "An error occurred: " . $e->getMessage();
}

Keywords

validation security input sanitization database queries user interface

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