/**
 * PHP简单的多字节字符串翻转
 *
 * @param 
 * @arrange 网： jb51.cc
 **/
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;
}
/***   来自编程之家 jb51.cc（jb51.cc）   ***/