First root of a number

Posted on 16th Feb 2014 07:03 pm by admin

Hi,

I can't find any function in php to give me the first root of a number.
Is there any built-in function for it?

For example:
81 => 3
9 => 3
64 => 2
256 => 2

I wrote this function to get it, But it seems sqrt always return a float.

Code: <?php
function getRoot($num)
{
if (is_int(sqrt($num))) // (strpos(sqrt($num), '.'))
$num = sqrt($num);

return $num;
}
?>

Any idea?

Your Answer:

Login to answer

Other forums

need to apply an if/else statement to Tim Thumb script
Not sure how to work this. I essentially want to call a variety of image sizes based on which style

is_dir() problem
Hello,

I'm buidling a php scripts that dynamically get's subfolders from a specific folder.

How to Create a Dynamic table
col1 col2 date1 date2 date3 date4..........
a b v1 v2 v3 v4

mySQL and PHP search
Hello,
I am trying to code a project and ran into a brick wall with one of my pages. I am pretty

Standard DES encryption script?
Can anybody point me to a tutorial or a short script that shows how to encrypt some text with salt i

Multi-image upload problems
Lets see if I can get some help on this one. Can anyone show me what I am doing wrong here. I'm just

Creating web pages by php
Hello again,
I was just wondering us there a way to use a php script to create a new web page. I

Undefined index on my form
ok im getting Undefined index on this line.. print_r($_REQUEST['form']);

below is the full sc

Limiting uploaded file type
Hi. First post here
I am working on a simple upload script, and I need it to limit the allowed f

How to set pass login name from htaccess to php
When the user logs into my members page via htaccess, I'd like to retain the username so that I can