(PHP 4, PHP 5)
bcscale — Set default scale parameter for all bc math functions
Sets the default scale parameter for all subsequent bc math functions that do not explicitly specify a scale parameter.
The scale factor.
成功时返回 TRUE， 或者在失败时返回 FALSE.
Example #1 bcscale() example
<?php
// default scale : 3
bcscale(3);
echo bcdiv('105', '6.55957'); // 16.007
// this is the same without bcscale()
echo bcdiv('105', '6.55957', 3); // 16.007
?>