PHP requires different solutions for floating point data _ php instance

This article mainly introduces how to solve floating point data in PHP in different ways. For more information, see. Php: BCMath

Bc is short for Binary Calculator. Bc * function parameters are all operands plus an optional [int scale], such as string bcadd (string $ left_operand, string $ right_operand [, int $ scale]). If scale is not provided, use the default value of bcscale. Here, the large number is represented by a string consisting of 0-9, and the return value is also a string.

Bcadd-add two high-precision numbers
Bccomp-compare two high-precision numbers and return-1, 0, 1
Bcp-division of two high-precision numbers
Bcmod-precise digital Remainder
Bcmul-multiply two high-precision numbers
Bcpow-calculate a high-precision digital Multiplier
Bcpowmod-modulus of high-precision multiplication of numbers, which is very common in number theory.
Bcscale-the default number of decimal places configured, which is equivalent to "scale =" in Linux bc"
Bcsqrt-calculate the square root of a precise number
Bcsub-Subtract two high-precision numbers

You can refer to the Manual to check the application of these functions.

The Code is as follows:

/* Bcsub Function Description
This function subtract two high-precision numbers and input two strings, minus the right operand value on the left. Scale is an optional option, indicating the number of digits required after the decimal point of the returned value. */
// The following Code ensures that the decimal point is one digit.
$ Aa = bcsub (134.7, 52.5, 1 );
Echo $ aa; // exit;
$ Bb = bcsub ($ aa, 82.2, 1 );
Echo $ bb; // exit;
// Floor