bcsub
Subtract one arbitrary precision number from another
Description
string bcsub(string $num1, string $num2, intnull $scale = null)
Subtracts num2 from num1.
Parameters
-
num1
-
The left operand, as a string.
-
num2
-
The right operand, 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.
Return Values
The result of the subtraction, as a string.
Errors/Exceptions
This function throws a ValueError in the following cases:
-
num1 or num2
is not a well-formed BCMath numeric string.
-
scale is outside the valid range.
Examples
Example #1 bcsub example
<?php
$a = '1.234';
$b = '5';
echo bcsub($a, $b); // -3
echo bcsub($a, $b, 4); // -3.7660
?>