Write a PHP program to create a new string taking the first 3 characters of a given string and return the string with the 3 characters added at both the front and back. If the given string length is less than 3, use whatever characters are there

<?php
function test($str) 
{
   if (strlen($str) < 3)
            {
                return $str.$str.$str;
            }
            else
            {
                $front = substr($str, 0, 3);
                return $front.$str.$front;
            }
        }
echo test("Python")."\n";
echo test("JS")."\n";
echo test("Code")."\n";