function characet($data){
if( !empty($data) ){
$fileType = mb_detect_encoding($data , array('UTF-8','GBK','LATIN1','BIG5')) ;
if( $fileType != 'UTF-8'){
$data = mb_convert_encoding($data ,'utf-8' , $fileType);
}
}
return $data;
}
转：http://www.linuxde.net/2013/04/13200.html
