What are some common mistakes to avoid when trying to protect a website with a password in PHP?

One common mistake to avoid when trying to protect a website with a password in PHP is storing passwords in plain text. Instead, passwords should be securely hashed using a strong hashing algorithm like bcrypt. This helps to protect user passwords in case of a data breach.

// Hash the password using bcrypt before storing it in the database
$password = password_hash($_POST['password'], PASSWORD_BCRYPT);