find the kth longest word in a string in php

main.php
function kthLongestWord($str, $k) {
  // convert string to array of words
  $words = explode(' ', $str);
  
  // sort the array by word length in descending order
  usort($words, function($a, $b) {
    return strlen($b) - strlen($a);
  });
  
  // return the kth longest word
  return $words[$k-1];
}

// Example usage
$str = "The quick brown fox jumps over the lazy dog";
$k = 3; // find the 3rd longest word
$result = kthLongestWord($str, $k);
echo "The $k" . "rd" . " longest word is: " . $result;
// Output: "The 3rd longest word is: jumps"
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