Find The Square Root Of A Number In PHP

This Program Is About How To Find Square Root Of Given Number In PHP.

PHP CODE FILE

<?php
function sqr($a)

{
$sqr=$a*$a;
return $sqr;
}
$x=5;
$ans=sqr($x);
echo"<h1>1 squre root <h1>";
echo"squre is:".$ans;

?>