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Refreshing the webpage again adds data to the DB

I have a php webpage with a form. After filling out the form on the web page, I can send it to the server. But after that, if I refresh the page, it inserts the same record into the database. Are there any solutions to this problem?

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7 answers

Use the POST / Redirect / GET pattern . This will not allow the user to resubmit the same form.

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There are several ways, for example:

  • Create the token that you insert into the form (hidden field). if the same token is sent twice, cancel the second submit.
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  • , Post/Redirect/Get pattern ( ).
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process.php action.

process.php

//code to insert item to database
header('Location: YOUR_FORM_PAGE_HERE);

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INSERT IGNORE INTO table_name ...

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