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, PHP 8)
sqrt — Square root
Parameters
-
num -
The argument to process
Return Values
The square root of num
or the special value NAN for negative numbers.
Examples
Example #1 sqrt() example
<?php
// Precision depends on your precision directive
echo sqrt(9); // 3
echo sqrt(10); // 3.16227766 ...
?>See Also
- pow() - Exponential expression
M_SQRTPI-sqrt(pi)M_2_SQRTPI-2/sqrt(pi)M_SQRT2-sqrt(2)M_SQRT3-sqrt(3)M_SQRT1_2-1/sqrt(2)
add a note
User Contributed Notes 1 note
jouhni at web dot de ¶
19 years ago
