(PHP 8 >= 8.4.0)
BcMath\Number::compare — Compares two arbitrary precision numbers
Compare two arbitrary precision numbers. This method behaves similar to the spaceship operator.
numscalescale to use for comparison.
If null, all digits are used in the comparison.
Returns 0 if the two numbers are equal,
1 if $this is greater than num,
-1 otherwise.
This method throws a ValueError in the following cases:
num is string and not a well-formed BCMath numeric stringscale is outside the valid range示例 #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),
);
?>以上示例会输出：
int(0) int(0) int(-1) int(1)
示例 #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),
);
?>以上示例会输出：
int(0) int(-1) int(1) int(0)