PHP Math Functions:
abs() Returns the absolute value of a number
acos() Returns the arccosine of a number
acosh() Returns the inverse hyperbolic cosine of a number
asin() Returns the arcsine of a number
asinh() Returns the inverse hyperbolic sine of a number
atan() Returns the arctangent of a number as a numeric value between -PI/2 and PI/2 radians
atan2() Returns the angle theta of an (x,y) point as a numeric value between -PI and PI radians
atanh() Returns the inverse hyperbolic tangent of a number
base_convert() Converts a number from one base to another
bindec() Converts a binary number to a decimal number
ceil() Returns the value of a number rounded upwards to the nearest integer
cos() Returns the cosine of a number
cosh() Returns the hyperbolic cosine of a number
decbin() Converts a decimal number to a binary number
dechex() Converts a decimal number to a hexadecimal number
decoct() Converts a decimal number to an octal number
deg2rad() Converts a degree to a radian number
exp() Returns the value of Ex
expm1() Returns the value of Ex - 1
floor() Returns the value of a number rounded downwards to the nearest integer
fmod() Returns the remainder (modulo) of the division of the arguments
getrandmax() Returns the maximum random number that can be returned by a call to the rand() function
hexdec() Converts a hexadecimal number to a decimal number
hypot() Returns the length of the hypotenuse of a right-angle triangle
is_finite() Returns true if a value is a finite number
is_infinite() Returns true if a value is an infinite number
is_nan() Returns true if a value is not a number
lcg_value() Returns a pseudo random number in the range of (0,1)
log() Returns the natural logarithm (base E) of a number
log10() Returns the base-10 logarithm of a number
log1p() Returns log(1+number)
max() Returns the number with the highest value of two specified numbers
min() Returns the number with the lowest value of two specified numbers
mt_getrandmax() Returns the largest possible value that can be returned by mt_rand()
mt_rand() Returns a random integer using Mersenne Twister algorithm
mt_srand() Seeds the Mersenne Twister random number generator
octdec() Converts an octal number to a decimal number
pi() Returns the value of PI
pow() Returns the value of x to the power of y
rad2deg() Converts a radian number to a degree
rand() Returns a random integer
round() Rounds a number to the nearest integer
sin() Returns the sine of a number
sinh() Returns the hyperbolic sine of a number
sqrt() Returns the square root of a number
srand() Seeds the random number generator
tan() Returns the tangent of an angle
tanh() Returns the hyperbolic tangent of an angle
