/**

+----------------------------------------------------------

*  去掉bom头

+----------------------------------------------------------

* @access protected

* @author John <***@gmail.com>

+----------------------------------------------------------

* @param string $contents 输出内容

+----------------------------------------------------------

* @return string

+----------------------------------------------------------

*/

protected function removeBOM($contents) {

$charset[1] = substr($contents, 0, 1);

$charset[2] = substr($contents, 1, 1);

$charset[3] = substr($contents, 2, 1);

if (ord($charset[1]) == 239 && ord($charset[2]) == 187 && ord($charset[3]) == 191) {

$rest = substr($contents, 3);

return $rest;

} else {

return $contents;

}

}