PHP Manual: Divide two arbitrary precision numbers

string bcdiv(string $num1, string $num2, intnull $scale = null)

Divides num1 by num2.

num1: The dividend, as a string.
num2: The divisor, as a string.
scale: This parameter is used to set the number of digits after the decimal place in the result. If null, it will default to the default scale set with bcscale, or fallback to the value of the bcmath.scale INI directive.

Returns the result of the division as a string.

This function throws a ValueError in the following cases:

This function throws a DivisionByZeroError exception if num2 is 0.

Version	Description
8.0.0	`scale` is now nullable.
8.0.0	Dividing by `0` now throws a DivisionByZeroError exception instead of returning `null`.

Example #1 bcdiv example

<?php

echo bcdiv('105', '6.55957', 3);  // 16.007

?>

bcdiv