log1p --
Returns log(1 + number), computed in a way that accurate even when the val
ue of number is close to zero
Description
float log1p ( float number)
Warning
This function is
EXPERIMENTAL. The behaviour of this function, the
name of this function, and anything else documented about this
function may change in a future release of PHP without notice. Be
warned and use this function at your own risk.
Warning
This function is
currently not documented; only the argument list is
available.
