SetaPDF_Extractor_Filter_Multi The multi filter allows you to create a filter by several filter instances.
The filters are evaluated by an OR logic by default. If one of the filters match, the item will be accepted. It is also possible to use the filter with an AND logic by passing the mode constant to its snd parameter of the constructor.
Defines that the filter should work in "and"-mode: All filters have to accept the text item.
Defines that the filter should work in "or"-mode: At least one filter have to accept the text item.