Count the total number of palindromes in a word.

countPalindromes

function countPalindromes($word) {
  $palindromes = 0;
  $word_length = strlen($word);
  for ($chunk_size = $word_length; $chunk_size > 0; --$chunk_size) {
    for ($pos = 0; $pos <= ($word_length - $chunk_size); $pos++) {
      $substr = substr($word, $pos, $chunk_size);
      if ($substr === strrev($substr)) {
        ++$palindromes;
      }
    }
  }

  return $palindromes;
}