Password generated by php_hash (). verification fails after a period of time

During password generation: {code...} during password verification: {code...} $ pass is obtained from the database, and $ password is entered by the user. After a period of time, verification is always FALSE. Are you sure you have not modified the password. Where is the problem? When the password is generated:

Password_hash ($ this-> input-> post ('pass'), PASSWORD_BCRYPT)

Password Verification:

Password_verify ($ password, $ pass );

$ PassIs obtained from the database,$ PasswordIs input by the user.

After a period of time, verification is always FALSE. Are you sure you have not modified the password.

Where is the problem?

Reply content:

When the password is generated:

Password_hash ($ this-> input-> post ('pass'), PASSWORD_BCRYPT)

Password Verification:

Password_verify ($ password, $ pass );

$ PassIs obtained from the database,$ PasswordIs input by the user.

After a period of time, verification is always FALSE. Are you sure you have not modified the password.

Where is the problem?

We recommend that you use the following password_hash ($ password, PASSWORD_DEFAULT) when generating a password hash );