PHP includes numerous libraries and functions to facilitates working with mathematical calcluations. These functions are listed below:

List of PHP BC Math functions
FUNCTION DESCRIPTION
bcadd Add two arbitrary precision numbers
bccomp Compare two arbitrary precision numbers
bcdiv Divide two arbitrary precision numbers
bcmod Get modulus of an arbitrary precision number
bcmul Multiply two arbitrary precision numbers
bcpow Raise an arbitrary precision number to another
bcpowmod Raise an arbitrary precision number to another, reduced by a specified modulus
bcscale Set default scale parameter for all bc math functions
bcsqrt Get the square root of an arbitrary precision number
bcsub Subtract one arbitrary precision number from another

List of PHP Math functions
FUNCTION DESCRIPTION
abs Absolute value
acos Arc cosine
acosh Inverse hyperbolic cosine
asin Arc sine
asinh Inverse hyperbolic sine
atan2 Arc tangent of two variables
atan Arc tangent
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 Calculates the exponent of e
expm1 Returns exp(number) - 1, computed in a way that is accurate even when the value of number is close to zero
pi Get value of pi
pow Exponential expression
rad2deg Converts the radian number to the equivalent number in degrees
rand Generate a random integer
round Rounds a float
sin Sine
sinh Hyperbolic sine
sqrt Square root
srand Seed the random number generator
tan Tangent
tanh Hyperbolic tangent

List of PHP BC Statistics functions
FUNCTION DESCRIPTION
stats_absolute_deviation Returns the absolute deviation of an array of values.
stats_cdf_beta CDF function for BETA Distribution. Calculates any one parameter of the beta distribution given values for the others.
stats_cdf_binomial Calculates any one parameter of the binomial distribution given values for the others.
stats_cdf_cauchy Not documented
stats_cdf_chisquare Calculates any one parameter of the chi-square distribution given values for the others.
stats_cdf_exponential Not documented
stats_cdf_f Calculates any one parameter of the F distribution given values for the others.
stats_cdf_gamma Calculates any one parameter of the gamma distribution given values for the others.
stats_cdf_laplace Not documented
stats_cdf_logistic Not documented
stats_cdf_negative_binomial Calculates any one parameter of the negative binomial distribution given values for the others.
stats_cdf_noncentral_chisquare Calculates any one parameter of the non-central chi-square distribution given values for the others.
stats_cdf_noncentral_f Calculates any one parameter of the Non-central F distribution given values for the others.
stats_cdf_poisson Calculates any one parameter of the Poisson distribution given values for the others.
stats_cdf_t Calculates any one parameter of the T distribution given values for the others.
stats_cdf_uniform Not documented

List of PHP Trader functions
FUNCTION DESCRIPTION
trader_acos Vector Trigonometric ACos
trader_ad Chaikin A/D Line
trader_add Vector Arithmetic Add
trader_adosc Chaikin A/D Oscillator
trader_adx Average Directional Movement Index
trader_adxr Average Directional Movement Index Rating
trader_apo Absolute Price Oscillator
trader_aroon Aroon
trader_aroonosc Aroon Oscillator
trader_asin Trigonometric ASin
trader_atan Trigonometric ATan
trader_atr Average True Range
trader_avgprice Average Price
trader_bbands  Bollinger Bands
trader_beta Beta
trader_bop Balance Of Power
trader_cci Commodity Channel Index
trader_cdl2crows Two Crows
trader_cdl3blackcrows Three Black Crows
trader_cdl3inside  Three Inside Up/Down
trader_cdl3linestrike  Three-Line Strike
trader_cdl3outside Three Outside Up/Down
trader_cdl3starsinsouth Three Stars In The South
trader_trix 1-day Rate-Of-Change (ROC) of a Triple Smooth EMA
trader_tsf Time Series Forecast
trader_typprice Typical Price
trader_ultosc  Ultimate Oscillator
trader_var Variance
trader_wclprice Weighted Close Price