PHP Math Functions

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# PHP Math Functions

## PHP Math Introduction

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 Functions

PHP: indicates the earliest version of PHP that supports the function.

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

## 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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