PHP Math Functions

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PHP Math Introduction

The math functions can handle values within the range of integer and float types.

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Installation

The math functions are part of the PHP core. There is no installation needed to use these functions.

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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

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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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