$_field
$_field : string
The name of the field that should be restricted.
This class provides a date query filter
A filter will restrict any query for a given field, showing only results matching the filter. In essence, this is a limited version of the range query facility supported by Lucene.
__construct(string $field, integer $start, integer $end)
Create a new date filter.
Only one of the filter bounds may be 0, indicating no limit in that direction.
| string | $field | The name of the field that should be filtered. |
| integer | $start | Start of filter range (or 0 for no start filter) |
| integer | $end | End of filter range (or 0 for no end filter) |