Re: Perfect Squares
| From: | John Kaspar | Date: | Tue, 25 May 2004 23:05:20 +0000 |
| Subject: | Re: Perfect Squares | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-186962@lists.php.net to get a copy of this message | ||
Try taking the square root of the variable
$sqrt = sqrt($var);
then compare the number of decimal places.
if (strlen(strstr($sqrt,".")) <= strlen(strstr($var,"."))) {
// perfect
}
Just guessing of course.
On 5/25/2004 5:06 PM, Stephen Craton wrote:
I'm in a bit of a pickle. I need to find out if a variable is a perfect square or not, and this needs to test for decimal numbers as well, such as 2.25. The thing is, the only function I've found in PHP is gmp_perfect_square() which isn't supported on my web server, and I don't know how to compile the GMP code into PHP on my windows box. So, how exactly would you go about finding out if something is a perfect square or not? Thanks, Stephen Craton http://www.melchior.us