M_PI |
3.14159265358979323846 |
Pi |
|
M_E |
2.7182818284590452354 |
e |
|
M_LOG2E |
1.4426950408889634074 |
log_2 e |
|
M_LOG10E |
0.43429448190325182765 |
log_10 e |
|
M_LN2 |
0.69314718055994530942 |
log_e 2 |
|
M_LN10 |
2.30258509299404568402 |
log_e 10 |
|
M_PI_2 |
1.57079632679489661923 |
pi/2 |
|
M_PI_4 |
0.78539816339744830962 |
pi/4 |
|
M_1_PI |
0.31830988618379067154 |
1/pi |
|
M_2_PI |
0.63661977236758134308 |
2/pi |
|
M_SQRTPI |
1.77245385090551602729 |
sqrt(pi) |
PHP 5.2.0 |
M_2_SQRTPI |
1.12837916709551257390 |
2/sqrt(pi) |
|
M_SQRT2 |
1.41421356237309504880 |
sqrt(2) |
|
M_SQRT3 |
1.73205080756887729352 |
sqrt(3) |
PHP 5.2.0 |
M_SQRT1_2 |
0.70710678118654752440 |
1/sqrt(2) |
|
M_LNPI |
1.14472988584940017414 |
log_e(pi) |
PHP 5.2.0 |
M_EULER |
0.57721566490153286061 |
Euler constant |
PHP 5.2.0 |
PHP_ROUND_HALF_UP |
1 |
Round halves up |
PHP 5.3.0 |
PHP_ROUND_HALF_DOWN |
2 |
Round halves down |
PHP 5.3.0 |
PHP_ROUND_HALF_EVEN |
3 |
Round halves to even numbers |
PHP 5.3.0 |
PHP_ROUND_HALF_ODD |
4 |
Round halves to odd numbers |
PHP 5.3.0 |
NAN |
NAN (as a float) |
Not A Number |
|
INF |
INF (as a float) |
The infinite |
|