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bcmul

(PHP 3, PHP 4, PHP 5)

bcmul -- Multiply two arbitrary precision number

说明

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

Multiply the left_operand by the right_operand.

参数

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. You can also set the global default scale for all functions by using bcscale().

返回值

Returns the result as a string.

范例

例 1. bcmul() example

<?php
echo bcmul('1.34747474747', '35', 3); // 47.161
echo bcmul('2', '4'); // 8
?>

参见

bcdiv()


add a note add a note User Contributed Notes
xpheas (at) gmail . com
14-Jun-2007 03:13
if you have compiled php width "--disable-bcmath", you can use this:

<?php
  function bcmul($_ro, $_lo, $_scale=0)
  {
   return round($_ro*$_lo, $_scale);
  }
?>
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