php简单的多字节字符串翻转
<?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; }