The math functions can handle values within the range of integer and float types.
Installation
The math functions are part of the PHP core. There is no installation needed to use these functions.
PHP Math Constants
PHP: indicates the earliest version of PHP that supports the constant.
| Constant | Description | PHP |
|---|---|---|
| M_E | Returns e (approx. 2.718) | 4 |
| M_EULER | Returns Euler's constant (approx. 0.577) | 4 |
| M_LNPI | Returns the natural logarithm of PI (approx. 1.144) | 4 |
| M_LN2 | Returns the natural logarithm of 2 (approx. 0.693) | 4 |
| M_LN10 | Returns the natural logarithm of 10 (approx. 2.302) | 4 |
| M_LOG2E | Returns the base-2 logarithm of E (approx. 1.442) | 4 |
| M_LOG10E | Returns the base-10 logarithm of E (approx. 0.434) | 4 |
| M_PI | Returns PI (approx. 3.14159) | 3 |
| M_PI_2 | Returns PI/2 (approx. 1.570) | 4 |
| M_PI_4 | Returns PI/4 (approx. 0.785) | 4 |
| M_1_PI | Returns 1/PI (approx. 0.318) | 4 |
| M_2_PI | Returns 2/PI (approx. 0.636) | 4 |
| M_SQRTPI | Returns the square root of PI (approx. 1.772) | 4 |
| M_2_SQRTPI | Returns 2/square root of PI (approx. 1.128) | 4 |
| M_SQRT1_2 | Returns the square root of 1/2 (approx. 0.707) | 4 |
| M_SQRT2 | Returns the square root of 2 (approx. 1.414) | 4 |
| M_SQRT3 | Returns the square root of 3 (approx. 1.732) | 4 |
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