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
source:http://www.w3schools.com/php/php_ref_math.asp
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