What are the potential security risks associated with using PHP scripts to backup a database?

One potential security risk associated with using PHP scripts to backup a database is SQL injection attacks. To mitigate this risk, it is important to properly sanitize user input and use prepared statements when executing SQL queries.

// Example of using prepared statements to backup a database in PHP

// Connect to the database
$pdo = new PDO('mysql:host=localhost;dbname=mydatabase', 'username', 'password');

// Prepare the SQL statement
$stmt = $pdo->prepare('SELECT * FROM mytable');

// Execute the statement
$stmt->execute();

// Fetch the results
$results = $stmt->fetchAll();

// Backup the results to a CSV file
$fp = fopen('backup.csv', 'w');
foreach ($results as $result) {
    fputcsv($fp, $result);
}
fclose($fp);