Hello, My index page includes a script that creates a database and fills it from .csv files in the home directory. How do I prevent the script from running more than once? I obviously only need the database created the very first time the program runs. I have tried include_once, but the tables still fills with duplicate data every time index.php is refreshed. What am I doing wrong? Never built a whole web app before so I'm going to have many more questions like this. Thanks!