With this function one can set the maximum idle time to a new
value. The term "idle time" describes the maximum time
interval (in seconds) between two actions by the user. If the
maximum idle time is reached, the user will be automatically logged
out. If on the other hand the user performs any action within the
maximum idle time interval, the idle time is reset.
Parameter
integer
$time
idle time in seconds
boolean
$add
if TRUE$time
is added to the existing idle time,
if FALSE the existing time value will be replaced.