(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.
此函數(shù)沒有參數(shù)。
Returns an array with the same structure as the array returned by EvStat::attr() . The array contains previously detected values.