PHP利用iconv进行编码转换

改进2：

function toUtf8($string){$str=@iconv(NULL, 'UTF-8', $string);return $str?$str:$string;}

改进1：

function toUtf8($string){$codes=array('UTF-8','GB2312','ASCII');foreach ($codes as $cd){if($str=@iconv($cd, 'UTF-8', $string))return $str;}}

原版：

function toUtf8($string){$codes=array('UTF-8','GB2312','ASCII');foreach ($codes as $cd){if($string===@iconv('UTF-8',$cd,$str=@iconv($cd, 'UTF-8', $string)))return $str;}}