Method: Check if checking for bad word is enabled.
Method: Validate if there are minimum items in an array.
Method: Check if a upload field’s value array have error.
Method: Check if upload field file size is greater then allowed.
Method: Check file array contain allowed mime types.
Method: Validate an upload field.
Method: Validate if value is not zero.
Method: Validate `is_email` field.
Method: Sanitize tags field.
Method: Sanitize upload field.
