What are the potential security risks associated with storing passwords in a database using a combination of user-specific and static salts in PHP?

Storing passwords in a database using a combination of user-specific and static salts in PHP can introduce security risks if the salts are not properly managed. If an attacker gains access to the database and the salts, they may be able to easily crack the passwords using brute force or dictionary attacks. To mitigate this risk, it is important to securely store the salts separately from the passwords and use a strong hashing algorithm such as bcrypt.

// Generate a random user-specific salt
$user_salt = bin2hex(random_bytes(16));

// Generate a static salt
$static_salt = "static_salt_here";

// Combine user-specific and static salts with the password
$combined_salt = $user_salt . $static_salt;
$hashed_password = password_hash($password . $combined_salt, PASSWORD_BCRYPT);

// Store the hashed password and user-specific salt in the database
// Remember to securely store the static salt separately