(PECL ev >= 0.2.0)
EvStat::prev — Returns the previous set of values returned by EvStat::attr
public EvStat::prev ( ) : void
Just like EvStat::attr() , but returns the previous set of values.
This function has no parameters.
Returns an array with the same structure as the array returned by EvStat::attr() . The array contains previously detected values.
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https://www.php.net/manual/en/evstat.prev.php