Password Encryption / Decryption

I’ve watched the Videos https://www.dmxzone.com/go/32652/using-password-encryption-with-login and https://wapplerunwrapped.online/videoplayer.php?id=22 , also searched around the forum, but the Register + Login steps arent neat eplained together… So this below is not clear to me

I need to SALT password or HASH them or Encrypt / Decrypt? ¨

As far as I know that “SALT KEY” can be anything and should kept secretly for generating the random passwords. But now I’m just getting everytime the same passwords hashed/salted for ALL users … pfff

1. Register Form
2. Get $password als cleartext and store it (Hashed, EncryptPassword, Salted???) ?

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Then Login step would be:

1. Login Form
2. Get $password and compare it to stored value from DB and Encrypt or Hash or Salt it?

Maybe