Form validation

Question

I need to create a form that has many of the same fields, that have to be inserted into a database, but the problem I have is that if a user only fills in one or two of the

Answer 1

You can do JavaScript validation by using the submit button to call a JavaScript function instead of submitting the form. If the data passes your validation criteria, the JavaScript function can then submit the data. However, you should not rely completely on JavaScript validation. If the user has JavaScript disabled, their data will not be validated, so your PHP application must be robust enough to handle blank data. It isn't just blank data that you need to be concerned with, though. You need to validate the user input for garbage and sanitize the data before using it in the database.