log1p
(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
Description
float log1p
( float $number
)
Warning
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.
Parameters
- number
-
The argument to process
Return Values
log(1 + number )
ChangeLog
| Version | Description |
|---|---|
| 5.3.0 | This function is now available on all platforms |