(PHP 4, PHP 5, PHP 7, PHP 8)
log — Natural logarithm
If the optional
base
parameter is specified,
log()
returns log
base
num
, otherwise
log()
returns the natural logarithm of
num
.
num
The value to calculate the logarithm for
base
The optional logarithmic base to use (defauls to 'e' and so to the natural logarithm).
The logarithm of
num
to
base
, if guiven, or the
natural logarithm.