For arbitrary precision mathematics PHP offers the Binary Calculator which supports numbers of any size and precision, represented as strings.

Since PHP 4.0.4, libbcmath is bundled with PHP. You don't need any external libraries for this extension.

In PHP 4, these functions are only available if PHP was configured with
`--enable-bcmath`.
In PHP 3, these functions are only available if PHP was not configured with
`--disable-bcmath`.

This extension does not define any configuration directives.

This extension does not define any resource types.

This extension does not define any constants.

**Table of Contents**- 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 number
- bcpow -- Raise an arbitrary precision number to another
- 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