PHP uses a very long (oversized) digital operation to prevent digital display with scientific notation _php skills

The example of this article is about the method of using super long (large) digital operation to prevent digital display with scientific counting method. Share to everyone for your reference, specific as follows:

PHP makes a mistake when calculating large numeric operations, and when the number is too large, the value becomes the scientific count. So how do you do PHP super large numerical operations, including subtraction, power operations, square roots, modulo operations?

To solve the scientific count problem, just add a pair of quotes when assigning a value.

Such as:

<?php
$n = ' 22222222222222222222222222220 ';
echo $n;
? >

If not quoted, show 2.2222222222222E+28, quote 22222222222222222222222222220

Super large numerical operation, including subtraction, power operation, square root, modulo operation.

Use PHP's Bcmath function to create a custom function with the following code,

<?php
Function Calc ($m, $n, $x) {
  $errors =array (
    ' dividend cannot be zero ',
    ' negative number has no square root '
  );
  Switch ($x) {case
    ' Add ':
      $t =bcadd ($m, $n);
      break;
    Case ' Sub ':
      $t =bcsub ($m, $n);
      break;
    Case ' Mul ':
      $t =bcmul ($m, $n);
      break;
    Case ' div ':
      if ($n!=0) {
        $t =bcdiv ($m, $n);
      } else{return
        $errors [0];
      }
      break;
    Case ' POW ':
      $t =bcpow ($m, $n);
      break;
    Case ' mod ':
      if ($n!=0) {
        $t =bcmod ($m, $n);
      else{return
        $errors [0];
      }
      break;
    Case ' sqrt ':
      if ($m >=0) {
        $t =bcsqrt ($m);
      } else{return
        $errors [1];
      }
      break;
  $t =preg_replace ("/\.") *0+$/", ', $t);
  return $t;
}
/* Usage examples
/echo calc (' 11111111111111111111111111111111110 ', ', ', ' Add ');
? >

How to use:

Calc (parameter 1 parameter 2, parameter 3);
Parameter 3 Specifies the method of operation: Add Plus, sub minus, Mul, div except, pow power, mod modulo, sqrt for arithmetic square root
Plus minus good except: Parameter 1 Plus/minus/times/divided by parameter 2
Power: Parameter 1 of the argument is 2 times Square.
Modulus: The remainder obtained by parameter 1 divided by parameter 2.
Arithmetic square root: Calculate the arithmetic square root of parameter 1. Parameter 2 does not work, but cannot be omitted.

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I hope this article will help you with the PHP program design.