To get any root of a number your can use the pow() function:
pow(8, 1/3)
which gives you the third root of eight.
Jouhni
(PHP 4, PHP 5, PHP 7)
sqrt — 平方根
$arg
) : float
返回 arg 的平方根。
arg要处理的参数
返回 arg 的平方根，负数时返回 NAN。
Example #1 sqrt() 例子
<?php
// Precision depends on your precision directive
echo sqrt(9); // 3
echo sqrt(10); // 3.16227766 ...
?>
To get any root of a number your can use the pow() function:
pow(8, 1/3)
which gives you the third root of eight.
Jouhni