(PECL ev >= 0.2.0)
EvStat::prev — Returns the previous set of values returned by EvStat::attr
Just like EvStat::attr() , but returns the previous set of values.
锟剿猴拷锟斤拷没锟叫诧拷锟斤拷锟斤拷
Returns an array with the same structure as the array returned by EvStat::attr() . The array contains previously detected values.