<?phpfunction 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;}希望本文所述对大家的php程序设计有所帮助。