What security considerations should be taken into account when transferring data between a web server and a Phpmyadmin database on a Raspberry Pi using PHP?

When transferring data between a web server and a Phpmyadmin database on a Raspberry Pi using PHP, it is crucial to ensure that the connection is secure to prevent unauthorized access or interception of sensitive information. One way to enhance security is by using HTTPS protocol for secure data transmission. Additionally, it is important to sanitize user input to prevent SQL injection attacks and only grant necessary permissions to the database user. 

// Establish a secure connection to the database using PDO with HTTPS
$dsn = 'mysql:host=localhost;dbname=mydatabase;charset=utf8';
$username = 'username';
$password = 'password';
$options = array(
    PDO::MYSQL_ATTR_SSL_CA => '/path/to/ca-cert.pem',
    PDO::MYSQL_ATTR_SSL_VERIFY_SERVER_CERT => false
);

try {
    $dbh = new PDO($dsn, $username, $password, $options);
} catch (PDOException $e) {
    echo 'Connection failed: ' . $e->getMessage();
}

// Sanitize user input to prevent SQL injection
$user_input = $_POST['user_input'];
$sanitized_input = $dbh->quote($user_input);

// Grant necessary permissions to the database user
GRANT SELECT, INSERT, UPDATE, DELETE ON mydatabase.* TO 'username'@'localhost' IDENTIFIED BY 'password';

Keywords

SSL encryption SQL injection prepared statements authentication

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