Is Unique Value validation
This ascertains if the submitted data has not previously been submitted by the form (requires that the form is set to record in database).
- Error message - The message to display next to the element if the validation fails. This text should explain why the validation failed and what steps the user should take to remedy the error.
- Condition - A PHP expression which if returns false, means that the validation is not run. See here for more information.
- Case insensitive search - When searching for existing data should the search be case sensitive or not?