SplPriorityQueue::setExtractFlags Sets the mode of extraction &reftitle.description; public intSplPriorityQueue::setExtractFlags intflags &reftitle.parameters; flags Defines what is extracted by SplPriorityQueue::current, SplPriorityQueue::top and SplPriorityQueue::extract. SplPriorityQueue::EXTR_DATA (0x00000001): Extract the data SplPriorityQueue::EXTR_PRIORITY (0x00000002): Extract the priority SplPriorityQueue::EXTR_BOTH (0x00000003): Extract an array containing both The default mode is SplPriorityQueue::EXTR_DATA. &reftitle.returnvalues; Returns the flags of extraction.