(PHP 4, PHP 5, PHP 7, PHP 8)
bcsub — Subtract one arbitrary precision number from another
$num1, string $num2, ?int $scale = null): string
Subtracts the num2 from the
num1.
num1The left operand, as a string.
num2The right operand, as a string.
scaleThis optional parameter is used to set the number
of digits after the decimal place in the result. If omitted, it will default to the scale set
globally with the bcscale() function, or fallback to 0 if
this has not been set.
The result of the subtraction, as a string.
| Version | Description |
|---|---|
| 8.0.0 |
scale is now nullable.
|
Example #1 bcsub() example
<?php
$a = '1.234';
$b = '5';
echo bcsub($a, $b); // -3
echo bcsub($a, $b, 4); // -3.7660
?>