If the optional base parameter is specified, log() returns logbase arg, otherwise log() returns the natural logarithm of arg.
Замечание: The base parameter became available with PHP 4.3.0.
As always you can calculate the logarithm in base b of a number n, but using the mathematical identity: logb(n) = log(n)/log(b), where log is the neperian (or natural) logarithm.
See also exp().
| Пред. | Начало | След. |
| log1p | Уровень выше | max |
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