LII. Mathematical Functions

Introduction

These math functions will only handle values within the range of the integer and float types on your computer . ( this corresponds currently to the C types long resp . double ) If you need to handle bigger numbers , take a look at the arbitrary precision math functions .

Predefined Constants

The following values are defined as constants in PHP by the math extension :

טבלה 1 .

Only M_PI is available in PHP versions up to and including PHP 4.0.0. All other constants are available starting with PHP 4.0.0. Constants labeled [4.0.2] were added in PHP 4.0.2.

תוכן העניינים:
abs -- Absolute value
acos -- Arc cosine
acosh -- Inverse hyperbolic cosine
asin -- Arc sine
asinh -- Inverse hyperbolic sine
atan -- Arc tangent
atan2 -- arc tangent of two variables
atanh -- Inverse hyperbolic tangent
base_convert -- Convert a number between arbitrary bases
bindec -- Binary to decimal
ceil -- Round fractions up
cos -- Cosine
cosh -- Hyperbolic cosine
decbin -- Decimal to binary
dechex -- Decimal to hexadecimal
decoct -- Decimal to octal
deg2rad -- Converts the number in degrees to the radian equivalent
exp -- e to the power of ...
expm1 -- Returns exp(number) - 1, computed in a way that accurate even when the value of number is close to zero
floor -- Round fractions down
getrandmax -- Show largest possible random value
hexdec -- Hexadecimal to decimal
hypot -- Returns sqrt( num1*num1 + num2*num2)
is_finite --
is_infinite --
is_nan --
lcg_value -- Combined linear congruential generator
log -- Natural logarithm
log10 -- Base-10 logarithm
log1p -- Returns log(1 + number), computed in a way that accurate even when the val ue of number is close to zero
max -- Find highest value
min -- Find lowest value
mt_getrandmax -- Show largest possible random value
mt_rand -- Generate a better random value
mt_srand -- Seed the better random number generator
number_format -- Format a number with grouped thousands
octdec -- Octal to decimal
pi -- Get value of pi
pow -- Exponential expression
rad2deg -- Converts the radian number to the equivalent number in degrees
rand -- Generate a random value
round -- Rounds a float
sin -- Sine
sinh -- Hyperbolic sine
sqrt -- Square root
srand -- Seed the random number generator
tan -- Tangent
tanh -- Hyperbolic tangent