Php signup and login page using sha-256 and salting, with email otp verification

Hello there! I am looking for someone to look into my code and correct the PHP signup and login page with email OTP verification for my website. The page is utilizing SHA-256 and salting for maximum security. Furthermore, I would like the passwords to be encrypted using a reliable protocol. No email address verification should be required for the signing up process. Should you have any questions or need more clarification, feel free to contact me. Looking forward to hearing from you soon!