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like I want the user to send some info only once ..actually have sent a link thru email that opens a page with text box in it ..In that user sends some info by clicking a button..now I dont want user to use that link over and over to send the info …
..so how do i go abt it ? hope the ques isnt confusing
To me it seems that he wants each user to send information using that form once.
If I’m correct in my interpretation, you could send through a unique id with each email and send it through with the form data (along with the user’s email).
On the server, you’d have a database table which maps each email with a unique id. Whenever a user fills out the form, you’d check the id against the email and set a column in the table indicating that the user has already sent data with the form.
The first thing you’d do when receiving data is to check the database and check if the data has already been sent. If not, accept the data otherwise you could display an error message or something.