PHP Manual: BcMath\Number::compare

Description

public function BcMath\Number::compare(BcMath\Number|string|int $num, ?int $scale = null): int

Compare two arbitrary precision numbers. This method behaves similar to the spaceship operator.

Parameters

num: The value to be compared to.
scale: Specify the scale to use for comparison. If null, all digits are used in the comparison.

Return Values

Returns 0 if the two numbers are equal, 1 if $this is greater than num, -1 otherwise.

Errors/Exceptions

This method throws a ValueError in the following cases:

num is string and not a well-formed BCMath numeric string
scale is outside the valid range

Examples

Example #1 BcMath\Number::compare() example when scale is not specified

<?php
$number = new BcMath\Number('1.234');

var_dump(
    $number->compare(new BcMath\Number('1.234')),
    $number->compare('1.23400'),
    $number->compare('1.23401'),
    $number->compare(1),
);
?>

The above example will output:

int(0)
int(0)
int(-1)
int(1)

Example #2 BcMath\Number::compare() example of explicitly specifying scale

<?php
$number = new BcMath\Number('1.234');

var_dump(
    $number->compare(new BcMath\Number('1.299'), 1),
    $number->compare('1.24', 2),
    $number->compare('1.22', 2),
    $number->compare(1, 0),
);
?>