What are the potential pitfalls of implementing a user access system with login credentials to prevent unwanted entries in a database?

Potential pitfalls of implementing a user access system with login credentials include weak password security, vulnerability to brute force attacks, and the risk of password leaks. To mitigate these risks, it is important to enforce strong password policies, implement account lockout mechanisms after multiple failed login attempts, and securely store passwords using encryption techniques.

// Sample PHP code snippet for implementing secure password hashing and verification

// Hashing the password before storing it in the database
$hashed_password = password_hash($password, PASSWORD_DEFAULT);

// Verifying the password during login authentication
if (password_verify($input_password, $hashed_password)) {
    // Password is correct
    // Proceed with granting access to the user
} else {
    // Password is incorrect
    // Handle the error or display a relevant message
}