The math functions can handle values within the range of
integer and float types.
The math functions are part of the PHP core. There is no
installation needed to use these functions.
| Function |
Description |
PHP |
| abs() |
Returns the absolute value of a number |
3 |
| acos() |
Returns the arccosine of a number |
3 |
| acosh() |
Returns the inverse hyperbolic cosine
of a number |
4 |
| asin() |
Returns the arcsine of a number |
3 |
| asinh() |
Returns the inverse hyperbolic sine of
a number |
4 |
| atan() |
Returns the arctangent of a number as a
numeric value between -PI/2 and PI/2 radians |
3 |
| atan2() |
Returns the angle theta of an (x,y)
point as a numeric value between -PI and PI radians |
3 |
| atanh() |
Returns the inverse hyperbolic tangent
of a number |
4 |
| base_convert() |
Converts a number from one base to
another |
3 |
| bindec() |
Converts a binary number to a decimal
number |
3 |
| ceil() |
Returns the value of a number rounded
upwards to the nearest integer |
3 |
| cos() |
Returns the cosine of a number |
3 |
| cosh() |
Returns the hyperbolic cosine of a
number |
4 |
| decbin() |
Converts a decimal number to a binary
number |
3 |
| dechex() |
Converts a decimal number to a
hexadecimal number |
3 |
| decoct() |
Converts a decimal number to an octal
number |
3 |
| deg2rad() |
Converts a degree to a radian number |
3 |
| exp() |
Returns the value of Ex |
3 |
| expm1() |
Returns the value of Ex - 1 |
4 |
| floor() |
Returns the value of a number rounded
downwards to the nearest integer |
3 |
| fmod() |
Returns the remainder (modulo) of the
division of the arguments |
4 |
|
getrandmax() |
Returns the maximum random number that
can be returned by a call to the rand() function |
3 |
| hexdec() |
Converts a hexadecimal number to a
decimal number |
3 |
| hypot() |
Returns the length of the hypotenuse of
a right-angle triangle |
4 |
| is_finite() |
Returns true if a value is a finite
number |
4 |
| is_infinite() |
Returns true if a value is an infinite
number |
4 |
| is_nan() |
Returns true if a value is not a number |
4 |
| lcg_value() |
Returns a pseudo random number in the
range of (0,1) |
4 |
| log() |
Returns the natural logarithm (base E)
of a number |
3 |
| log10() |
Returns the base-10 logarithm of a
number |
3 |
| log1p() |
Returns log(1+number) |
4 |
| max() |
Returns the number with the highest
value of two specified numbers |
3 |
| min() |
Returns the number with the lowest
value of two specified numbers |
3 |
| mt_getrandmax() |
Returns the largest possible value that
can be returned by mt_rand() |
3 |
| mt_rand() |
Returns a random integer using Mersenne
Twister algorithm |
3 |
| mt_srand() |
Seeds the Mersenne Twister random
number generator |
3 |
| octdec() |
Converts an octal number to a decimal
number |
3 |
| pi() |
Returns the value of PI |
3 |
| pow() |
Returns the value of x to the power of
y |
3 |
| rad2deg() |
Converts a radian number to a degree |
3 |
| rand() |
Returns a random integer |
3 |
| round() |
Rounds a number to the nearest integer |
3 |
| sin() |
Returns the sine of a number |
3 |
| sinh() |
Returns the hyperbolic sine of a number |
4 |
| sqrt() |
Returns the square root of a number |
3 |
| srand() |
Seeds the random number generator |
3 |
| tan() |
Returns the tangent of an angle |
3 |
| tanh() |
Returns the hyperbolic tangent of an
angle |
4 |
| 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 |
