Besides the math operators, PHP comes with all kinds of math functions built inhere's the list of what's available to you in your scripts:
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. Converts a number between bases
bindec. Converts binary to decimal
ceil. Rounds fractions up
cos. Cosine
cosh. Hyperbolic cosine
decbin. Converts decimal to binary
dechex. Converts decimal to hexadecimal
decoct. Converts decimal to octal
deg2rad. Converts the number in degrees to the radian equivalent
exp. Calculates the exponent of e
expm1. Returns exp(number) - 1
floor. Rounds fractions down
fmod. Returns the floating point remainder of the division of the arguments
getrandmax. Shows the largest possible random value
hexdec. Converts hexadecimal to decimal
hypot. Returns sqrt(num1*num1 + num2*num2)
is_finite. Determines whether a value is a legal finite number
is_infinite. Determines whether a value is infinite
is_nan. Determines whether a value is not a number
lcg_value. Combined linear congruential generator
log10. Base 10 logarithm
log1p. Returns log(1 + number)
log. Returns the natural logarithm
max. Finds the highest value
min. Finds the lowest value
mt_geTRandmax. Shows the largest possible random value
mt_rand. Generates a better random value
mt_srand. Seeds the better random number generator
octdec. Converts octal to decimal
pi. Gets the value of pi
pow. Exponential expression
rad2deg. Converts the radian number to the equivalent number in degrees
rand. Generates 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
If you ever need some advanced math, PHP has the situation covered.
