(PHP 4, PHP 5, PHP 7)
bcsub — 2锟斤拷锟斤拷锟解精锟斤拷锟斤拷锟街的硷拷锟斤拷
$left_operand
, string $right_operand
[, int $scale = int
] ) : string
锟斤拷锟斤拷锟斤拷锟�锟斤拷去锟揭诧拷锟斤拷锟斤拷.
left_operand锟街凤拷锟斤拷锟斤拷锟酵碉拷锟斤拷锟斤拷锟斤拷锟�.
right_operand锟街凤拷锟斤拷锟斤拷锟酵碉拷锟揭诧拷锟斤拷锟斤拷.
scale锟剿匡拷选锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫斤拷锟斤拷锟叫★拷锟斤拷锟斤拷锟叫★拷锟轿伙拷锟斤拷锟揭诧拷锟酵拷锟绞癸拷锟� bcscale() 锟斤拷锟斤拷锟斤拷全锟斤拷默锟较碉拷小锟斤拷位锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫猴拷锟斤拷锟斤拷
锟斤拷锟截硷拷锟斤拷之锟斤拷锟斤拷为锟街凤拷锟斤拷锟斤拷锟斤拷.
Example #1 bcsub() example
<?php
$a = '1.234';
$b = '5';
echo bcsub($a, $b); // -3
echo bcsub($a, $b, 4); // -3.7660
?>