(PHP 4, PHP 5, PHP 7)
bcsqrt — 锟斤拷锟解精锟斤拷锟斤拷锟街的讹拷锟轿凤拷锟斤拷
$operand
[, int $scale
] ) : string
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥讹拷锟轿凤拷锟斤拷.
operand锟街凤拷锟斤拷锟斤拷锟酵的诧拷锟斤拷锟斤拷.
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
锟斤拷锟截讹拷锟轿凤拷锟斤拷锟侥斤拷锟轿拷址锟斤拷锟斤拷锟斤拷停锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角革拷锟斤拷锟津返伙拷null.
Example #1 bcsqrt() 示锟斤拷
<?php
echo bcsqrt('2', 3); // 1.414
?>