(PHP 4 >= 4.0.7, PHP 5)
log1p — Returns log(1 + number), computed in a way that is accurate even when the value of number is close to zero
This function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice in a future release of PHP. This function should be used at your own risk.
log1p() returns log(1 + number ) computed in a way that is accurante even when the value of number is close to zero. log() might only return log(1) in this case due to lack of precision.
The argument to process
log(1 + number )
|5.3.0||This function is now available on all platforms|