bcsub
(PHP 3, PHP 4, PHP 5)
bcsub --
Subtract one arbitrary precision number from another
Description
string
bcsub ( string left_operand, string right_operand [, int scale] )
Subtracts the right_operand from the
left_operand and returns the result in a
string. The optional scale parameter is
used to set the number of digits after the decimal place in the
result.
范例
例子 1. bcsub() example
<?php
$a = '1.234';
$b = '5';
echo bcsub($a, $b); // -3
echo bcsub($a, $b, 4); // -3.7660
?>
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