In the provided PHP code, what security considerations should be taken into account when storing user credentials in a text file?

Storing user credentials in a text file is not secure as the file can be easily accessed by unauthorized users. To enhance security, it is recommended to store user credentials in a secure database with proper encryption techniques. Additionally, access control measures should be implemented to restrict unauthorized access to the file.

// Instead of storing user credentials in a text file, use a secure database with encryption
// Implement access control measures to restrict unauthorized access to the file
// Consider using hashing algorithms like bcrypt for storing passwords securely