expm1

(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

Description

float expm1 ( 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.