What are some security considerations when using PHP scripts for e-commerce transactions?

One important security consideration when using PHP scripts for e-commerce transactions is to properly sanitize and validate user input to prevent SQL injection attacks. This can be done by using prepared statements or parameterized queries to interact with the database. Additionally, it is crucial to use secure HTTPS connections to encrypt sensitive data during transmission. 

// Example of using prepared statements to prevent SQL injection
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');
$stmt->bindParam(':username', $username);
$stmt->execute();
```

```php
// Example of enforcing HTTPS connection
if ($_SERVER['HTTPS'] != 'on') {
    header('Location: https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
    exit();
}

Keywords

SQL injection cross-site scripting encryption secure sockets layer (SSL) input validation

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