You actually have to validate both ways. That way you catch most of it on the frontend and leave the rare /edge cases to be handled by the backend.
Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink.
Hide child comments as well
Confirm
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
You actually have to validate both ways. That way you catch most of it on the frontend and leave the rare /edge cases to be handled by the backend.