(PHP 4 >= 4.1.0)

expm1 --  Returns exp(number) - 1, computed in a way that accurate even when the value of number is close to zero


float expm1 (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.