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
)
WarningThis 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
)
