PHP has a different approach to floating-point data

Php:bcmath

BC is the abbreviation of binary calculator. The arguments for the bc* function are the operands plus an optional [int scale], such as String Bcadd (String $left _operand, String $right _operand[, int $scale]), if scale does not provide , the default value of Bcscale is used. The large number is directly represented by a string of 0-9, and the result returns a string.

Bcadd-adds two high precision numbers

bccomp-compares two high-precision digits, returns-1, 0, 1

bcdiv-divides two high-precision digits

bcmod-to find high precision digit remainder

Bcmul-multiplies two high precision numbers

bcpow-to find high precision digital exponentiation

Bcpowmod-to seek high-precision digital exponentiation, the number theory is very common

bcscale-Configure the default decimal point number, which is equivalent to the "scale=" in Linux BC

bcsqrt-High precision Digital square root

bcsub-subtracts two high-precision digits

You can refer to the manual to find out the application of these functions.

PHP code?

/*bcsub function Description

This function subtracts two highly-accurate numbers, passes in two strings, and subtracts the right operand value from the left operand. Scale is an optional option that represents the number of digits required after the  decimal point of the returned value. */

The following code I was guaranteed a decimal point digit

$aa =bcsub (134.7,52.5,1);

echo $aa;//exit;

$BB =bcsub ($aa, 82.2, 1);

echo $bb;//exit;

You can try it out.