OnlinePHP.io - BCMath

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 or get 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