Powers and Logs
The PHP mathematical library includes the exponential and logarithmic functions listed in Table 2-5.
Table 2-5. Exponential and logarithmic functions
| Function | Description |
|---|---|
| float exp(float arg) | e to the power of arg |
| float pow(float base, number exp) | Exponential expression base to the power of exp |
| float sqrt(float arg) | Square root of arg |
| float log(float arg) | Natural logarithm of arg |
| float log10(float arg) | Base-10 logarithm of arg |