Palíndromo em Php
<?php
function palindrome($input) {
$middle = strlen($input) / 2;
$firstHalf = substr($input, 0, floor($middle));
$secondHalf = substr($input, ceil($middle));
return $firstHalf == strrev($secondHalf);
}
echo palindrome("racecar") ? "Palindrome" : "Not a palindrome";
DenverCoder1