How do I set a page to receive only the data from the specified page post?

If, after the user registration information has done the front-end verification, can you make some settings on the page receiving the data, only receive the data of the specified page.
How do I set it up?

Another problem is: if you limit the receipt of only one page sent over the data, is it possible not to do the back-end verification?

Reply content:

If, after the user registration information has done the front-end verification, can you make some settings on the page receiving the data, only receive the data of the specified page.
How do I set it up?

Another problem is: if you limit the receipt of only one page sent over the data, is it possible not to do the back-end verification?

Front-end use of authentication information + page information encryption, post to the backend to let back-end decryption, after the decryption to analyze the legality of the line.

The backend must be verified, never trust the data from the client

Pass a variable back end to determine if this variable is right

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