在PHP中反转多字节字符串

Posted 2021-02-24

It is a bit simpler reversing of multibyte strings.

<?php
function mb_strev ($string, $encoding = null) {
  if ($encoding === null) {
    $encoding = mb_detect_encoding($string);
  }
 
  $length = mb_strlen($string, $encoding);
  $reversed = '';
  while($length-- > 0) {
    $reversed .= mb_substring($string, $length, 1, $encoding);
  }
 
  return $reversed;
}