What are common pitfalls to avoid when implementing hash functions in PHP, and how can developers ensure consistent and secure hashing results?

One common pitfall is using insecure hashing algorithms like MD5 or SHA-1, which are no longer considered secure for hashing sensitive data. To ensure consistent and secure hashing results, developers should use stronger algorithms like bcrypt or Argon2, and properly salt their hashes to prevent rainbow table attacks. 

// Using bcrypt for secure hashing
$password = "secret_password";
$options = ['cost' => 12];
$hashed_password = password_hash($password, PASSWORD_BCRYPT, $options);

// Verifying hashed password
if (password_verify($password, $hashed_password)) {
    echo "Password is valid!";
} else {
    echo "Invalid password!";
}

Keywords

hash functions PHP consistent hashing secure hashing pitfalls

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