Are there any common pitfalls or best practices to consider when troubleshooting login issues on a PHP website?

Issue: When troubleshooting login issues on a PHP website, common pitfalls to consider include incorrect database connection details, hashing algorithm mismatches, and session handling errors. Best practices involve double-checking database credentials, ensuring password hashing algorithms match between registration and login processes, and properly managing user sessions.

// Check database connection details
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database_name";

// Verify password hashing algorithm
$hashed_password = password_hash($password, PASSWORD_DEFAULT);

// Ensure proper session handling
session_start();