(PHP 3, PHP 4 >= 4.0.0)

bcsub --  Subtract one arbitrary precision number from another


string bcsub (string left operand, string right operand [, int scale])

Subtracts the right operand from the left operand and returns the result in a string. The optional scale parameter is used to set the number of digits after the decimal place in the result.

See also bcadd().