How can PHP developers ensure the security of their code when handling user authentication and session management?

To ensure the security of their code when handling user authentication and session management, PHP developers should use secure hashing algorithms like bcrypt to store passwords, sanitize user input to prevent SQL injection attacks, and use SSL to encrypt data transmission. Additionally, developers should implement measures like CSRF tokens and session regeneration to prevent session hijacking. 

// Example of using bcrypt to securely hash and verify passwords
$password = 'mySecurePassword123';
$hashedPassword = password_hash($password, PASSWORD_BCRYPT);

// Verify password
if (password_verify($password, $hashedPassword)) {
    echo 'Password is correct';
} else {
    echo 'Password is incorrect';
}

Keywords

SQL injection cross-site scripting password hashing session hijacking secure cookie management

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