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php输出乱码有关问题

WBOY
WBOYOriginal
2016-06-13 13:45:43726browse

php输出乱码问题
只是调用了下数据库,竟然就出现乱码了!!!

程序如下

$q=$_GET["q"];


$con = mysql_connect("localhost","root","198600");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }
mysql_query("set names 'gb2312'"); 
mysql_select_db("my_db", $con);

$sql = "SELECT * FROM persons WHERE nick='$q'";
$query = mysql_query($sql);
 $rows=mysql_num_rows($query);
 if($rows)
{
  echo '用户名已被注册';
}
 else
{
  echo '用户名可用';
}
mysql_close($con);

?>


网页编码是gb2312
数据库编码是utf8

想不通的问题是,只是调用了下数据库,又没从数据库写入和输出,为啥页面输出会是乱码呢,求解!!

------解决方案--------------------
在头部加上header('Content-Type:text/html;charset=gb2312');

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