php - Printing data from DB in WordPress not working -

i trying print data database wordpress. however, not working expected. tried print simple variable.

$host="localhost"; // host name $username="root"; // username $password=""; // password $db_name="bk"; // database name // replace database connect functions depending on database using. mysql_connect("$host", "$username", "$password"); mysql_select_db($db_name); $tbl_nm="rg"; global $wpdb; $a=6; $b=9; $result = $wpdb->get_results ( "select nm rg" ); foreach ( $result $print )   { ?><tr><td><?php echo $print->nm; print $a+$b; ?></td> </tr> <?php } 

hey,,i sloved problem m not assign 'mysql_connect()' veriable

here code

  $host="localhost"; // host name   $username="root"; // username   $password=""; // password   $db_name="bk"; // database name    // replace database connect functions depending on database using.   $con=mysqli_connect("$host", "$username", "$password","$db_name");         $tbl_nm="rg";      global $wpdb;      $result = mysqli_query($con,"select * rg" );      while($row = mysqli_fetch_array($result))      {echo '    <td colspan="0">'.$row['nm'].'</td>';}     ?>