These math functions will only handle values within the range of the long and double types on your computer. If you need to handle bigger numbers, take a look at the arbitrary precision math functions.
The following values are defined as constants in PHP by the math extension:
Table 1. Math constants
| Constant | Value | Description |
|---|---|---|
| M_PI | 3.14159265358979323846 | The value of ¶ (pi) |