What are best practices for securing PHP scripts that handle sensitive user data like emails?

Sensitive user data like emails should be handled securely in PHP scripts to prevent unauthorized access. Best practices include using HTTPS to encrypt data in transit, storing passwords securely hashed in a database, and implementing input validation to prevent SQL injection and cross-site scripting attacks. 

// Example of securely handling sensitive user data like emails in PHP

// Ensure the script is accessed over HTTPS
if (!isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] !== 'on') {
    header('Location: https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
    exit;
}

// Hash passwords before storing in the database
$hashedPassword = password_hash($_POST['password'], PASSWORD_DEFAULT);

// Validate input to prevent SQL injection and XSS attacks
$email = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL);

// Process the sensitive user data securely
// Your code here

Keywords

SQL injection cross-site scripting encryption password hashing input validation

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