Write a PHP program to create a new string from a given string. If the two characters of the given string from its beginning and end are same return the given string without the first two characters otherwise return the original string

<?php
function test($s1)
 { 
      if (strlen($s1) > 1 && substr($s1, 0, 2) == substr($s1, strlen($s1) - 2))
          {
              return substr($s1, 2);
           }
      else
          {
              return $s1;
          }
 }

echo test("abcab") . "\n";
echo test("Python") . "\n";