(PHP 4 >= 4.1.0)
expm1 -- Returns exp(number) - 1, computed in a way that is accurate even when the value of number is close to zero切記! |
This function is EXPERIMENTAL. That means, that the behaviour of this function, this function name, in concreto ANYTHING documented here can change in a future release of PHP WITHOUT NOTICE. Be warned, and use this function at your own risk. |
切記! |
This function is currently not documented; only the argument list is available. |