How to determine if a MySQL update query succeeded when the data passed in the query is the same as what is already in the database?

Question

Let\'s say you have a form with pre-populated data from your database, and you allow your users to make changes and save the form. If the user clicks the save button without mak

Answer 1

Just check if no errors occurred after execution of query.
If you use mysql, check mysql_error():
if (!mysql_error()) print 'all is fine';
Same for mysqli.