Why is it important to understand that md5 is not encryption but a hashing algorithm in PHP?

It is important to understand that MD5 is not encryption because encryption is a two-way process that can be reversed, while hashing is a one-way process that cannot be reversed. In PHP, using MD5 for hashing passwords can lead to security vulnerabilities as MD5 is considered a weak hashing algorithm. To improve security, it is recommended to use stronger hashing algorithms like bcrypt or Argon2 for password hashing in PHP.

// Using bcrypt for password hashing in PHP
$password = "secret_password";
$hashed_password = password_hash($password, PASSWORD_BCRYPT);