The content (code) of the edit certificate file is such that the user will be able to edit a particular certificate among his certificates in the database.
I think for the purpose of user friendly, the person working on the view certificates have to add an edit button on the users certificates (for each of them) that will point the row (id) where the particular certificate to be edited is found. [e.g: <'button><'a href="edit_certificate.php?id=<?php echo $row['id']; ?>">Edit'</a'></button'>'].
The content (code) of the edit certificate file is such that the user will be able to edit a particular certificate among his certificates in the database. I think for the purpose of user friendly, the person working on the view certificates have to add an edit button on the users certificates (for each of them) that will point the row (id) where the particular certificate to be edited is found. [e.g: <'button><'a href="edit_certificate.php?id=<?php echo $row['id']; ?>">Edit'</a'></button'>'].