Reverse a string in Php

function reverseString($string) {
  $reversed = '';
  // loop through the string backwards
  for ($i = strlen($string) - 1; $i >= 0; $i--) {
    // append each character to the reversed string
    $reversed .= $string[$i];
  }
  // return the reversed string
  return $reversed;
}

//example
$result = reverseString('hello');

//output
echo $result; //olleh