PHP Prevents flush delivery

PHP prevents refresh commits
How can I prevent the data from being submitted to the database again when I refresh the page?

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To judge by the session
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Are you trying to prevent the form from repeating the commit? Then use JS to do AH.
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Submit form with OnClick to trigger, remove default Submit ...
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The simplest way is to judge by the session or by token
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Use the session to control.

On the form's page, set a session and place it in a form field. After submit, check if the session is the same as the form field. When you're done, change the value of the session.

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