(PHP 4 >= 4.1.0)

log1p --  Returns log(1 + number), computed in a way that accurate even when the val ue of number is close to zero


float log1p (float number)


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.


This function is currently not documented, only the argument list is available.