Not empty validation
The daddy of all validation rules! Ensures that the user has entered or selected something.
- 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.
- Tip text - The hover text used to describe the validation.