好， 知道了.

缺少chsrset = utf8导致了我的问题！

the missing chsrset=utf8 caused my problem!

$ pdo = new PDO("mysql:dbname = db239256x2330361; host = mysql.webhosting38.1blu.de; charset = utf8 "，"s239256_2330361"，"20dj93lpav + dd);

$pdo=new PDO("mysql:dbname=db239256x2330361;host=mysql.webhosting38.1blu.de;charset=utf8","s239256_2330361","20dj93lpav+dd");