lessthan_equalto Yes Returns FALSE if the value is not numeric or is greater than the maximum value provided.

Maximum value that the input can be
Optional : language directive for the input name

If the value UID input has a value the row with the UID value for the UID_col_name will be ignored in the search.
Required !
The following language directives are required in application/language/<language_name>/form_validation.php :

lessthan_equalto - The error message to provide, suggestion "The %s field must be a number less than or equal to %s"
lessthan_equalto_no_input - Used when the input has no value, suggestion "The %s field was not provided"

lessthan_equalto
[maximum_value{:lang_name}]