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bccomp

(PHP 3, PHP 4, PHP 5)

bccomp -- Compare two arbitrary precision numbers

说明

int bccomp ( string left_operand, string right_operand [, int scale] )

Compares the left_operand to the right_operand and returns the result as an integer.

参数

left_operand

The left operand, as a string.

right_operand

The right operand, as a string.

scale

The optional scale parameter is used to set the number of digits after the decimal place which will be used in the comparison.

返回值

Returns 0 if the two operands are equal, 1 if the left_operand is larger than the right_operand, -1 otherwise.

范例

例 1. bccomp() example

<?php

echo bccomp('1', '2') . "\n";   // -1
echo bccomp('1.00001', '1', 3); // 0
echo bccomp('1.00001', '1', 5); // 1

?>
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