(PHP 4, PHP 5, PHP 7)
bcsub — Subtract one arbitrary precision number from another
$left_operand
, string $right_operand
[, int $scale
= 0
] ) : string
Subtracts the right_operand
from the
left_operand
.
left_operand
The left operand, as a string.
right_operand
The right operand, as a string.
scale
This 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.
Example #1 bcsub() example
<?php
$a = '1.234';
$b = '5';
echo bcsub($a, $b); // -3
echo bcsub($a, $b, 4); // -3.7660
?>