网络上类似的代码大多只能在gb2312编码下使用，下面这个类同时能在utf-8编码下将汉字转换为拼音，具体的代码和用法如下： 

    ='5.0') ? array_combine($_TDataKey, $_TDataValue) : _Array_Combine($_TDataKey, $_TDataValue);arsort($_Data);reset($_Data);if($_Code != 'gb2312') $_String = _U2_Utf8_Gb($_String);$_Res = '';for($i=0; $i
    
     160) { $_Q = ord(substr($_String, ++$i, 1)); $_P = $_P*256 + $_Q - 65536; }$_Res .= _Pinyin($_P, $_Data);}return preg_replace("/[^a-z0-9]*/", '', $_Res);}function _Pinyin($_Num, $_Data){if ($_Num>0 && $_Num<160 ) return chr($_Num);elseif($_Num<-20319 || $_Num>-10247) return '';else {foreach($_Data as $k=>$v){ if($v<=$_Num) break; }return $k;}}function _U2_Utf8_Gb($_C){$_String = '';if($_C < 0x80) $_String .= $_C;elseif($_C < 0x800){$_String .= chr(0xC0 | $_C>>6);$_String .= chr(0x80 | $_C & 0x3F);}elseif($_C < 0x10000){$_String .= chr(0xE0 | $_C>>12);$_String .= chr(0x80 | $_C>>6 & 0x3F);$_String .= chr(0x80 | $_C & 0x3F);} elseif($_C < 0x200000) {$_String .= chr(0xF0 | $_C>>18);$_String .= chr(0x80 | $_C>>12 & 0x3F);$_String .= chr(0x80 | $_C>>6 & 0x3F);$_String .= chr(0x80 | $_C & 0x3F);}return iconv('UTF-8', 'GB2312', $_String);}function _Array_Combine($_Arr1, $_Arr2){for($i=0; $i