log
(PHP 4, PHP 5)
log — Natural logarithm
Description
float log
( float $arg
[, float $base
] )
Parameters
-
arg
-
The value to calculate the logarithm for
-
base
-
The optional logarithmic base to use
(defaults to 'e' and so to the natural logarithm).
Return Values
The logarithm of arg
to
base
, if given, or the
natural logarithm.