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
sqrt
(PHP 4, PHP 5, PHP 7)
sqrt — Square root
Descrierea
sqrt
( float
$num
) : float
Returns the square root of num.
Parametri
-
num -
The argument to process
Valorile întoarse
The square root of num
or the special value NAN for negative numbers.
Exemple
Example #1 sqrt() example
<?php
// Precision depends on your precision directive
echo sqrt(9); // 3
echo sqrt(10); // 3.16227766 ...
?>
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jouhni at web dot de ¶
19 years ago
