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What is bcsub in PHP?

Sheza Naveed

Overview

bcsub is a function in PHP that subtracts the second argument from the first argument.


Both arguments are arbitrary-precision numbers.


Syntax


bcsub(string $num1, string $num2, int $scale = null): string

Parameters

  • num1: variable of type string.

  • num2: variable of type string.

  • scale: variable of type int. This is an optional parameter.

    scale is used to set the number of digits after the decimal place in the result. The default value of scale is 0.

Return value

The bcsub function returns num2 - num1.


The function returned is of type string.

Code

<?php
$num1 = '1.34';
$num2 = '4';

echo bcsub($num1, $num2);
echo bcsub($num1, $num2, 2);
?>

Output

3
3.34

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