Two ways to connect php to mysql. Mysql garbled problem

//In conf/php.ini, use "/php_mysql" in vim to search extension=php_mysql.dll, remove the ";" in front, and add extension=php_mysqli.dll;
$mysqli below = new mysqli("127.0.0.1","Username", Password","Library name");
$query="select * from table order by theindex desc";
$mysqli->query("set names gb2312");//Be careful not to add garbled characters here
$result = $mysqli->query($query);
 //printf() function outputs a formatted string
while(list($name, $ theindex) = $result->fetch_row())
 echo(" ".$name.$theindex);
$con = mysql_connect("localhost", "username", "password") ;
if ($con) {
 mysql_query("set names 'gb2312'");
 mysql_select_db("library name", $con);//Be careful not to add garbled characters here
 $rs = mysql_query("select * from table order by theindex desc;", $con);
 if ($rs) {
 echo (""); while($row = mysql_fetch_assoc($rs))  { echo "" . "" . "" . " "; } mysql_free_result($rs); } echo ("



$row[theindex]
$row[name]




");
 mysql_close($con);
}