正则取出汉字
$abc = 'df台湾jdj台湾省sfujs';
$pregstr = "/[\x{4e00}-\x{9fa5}]+/u";
preg_match_all($pregstr, $abc, $res);
var_dump($res);die; $abc = 'df台湾jdj台湾省sfujs';
$pregstr = "/[\x{4e00}-\x{9fa5}]+/u";
preg_match_all($pregstr, $abc, $res);
var_dump($res);die;