for ($x=1;$x<=9;$x++){
     echo '<tr>';
for ($i=0;$i<=6;$i++){
if($i!=0){
       echo'<td>'.$x.'-'.$i.'</td>';
          }

 else{
         echo '<td align="center">'. $x.'</td>';
       }
         }
         echo '<tr>';
       }

for ($x=1;$x<=9;$x++){
              echo '<tr>';

          for ($i=0;$i<=6;$i++){


                if($i!=0){

                       $sql2="select * from EC6018 where ctime=:Ctime and weekday=:Weekday";
                    $sqlr =$connr->prepare($sql2);
                         $ar_val1=array('Ctime'=>$x,'Weekday'=>$i);


                                if($sqlr->execute($ar_val1)){

                                   while ($course=$sqlr->fetch())
                                   {

                                       echo '<td align="center">'.$x.'-'. $i.$course['classname'].'<br>'.$course['teacher'].'</td>';

                                    }

                                        }

                                else{

                                      echo'<td>'.$x.'-'.$i.'</td>';

                                      }

                                    }


                        else{

                                  echo '<td align="center">'. $x.'</td>';

                            }
                              }
                     echo '<tr>';
                  }