如何在时间表项目中使用php自动分配教师

如何根据特定时段的空缺分配老师？

例如：在第5班中，老师b在08:45 AM-09:30 AM时段分配，在其他班级中也是如此。代码如下：-

$get = isset($_GET['sch']) ? $_GET['sch'] : "school2" ;

$sql = "SELECT * FROM schools WHERE school = '$get' ";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // output data of each row
    while($row = $result->fetch_assoc()) {
        //echo "id: " . $row["id"]. " - Name: " . $row["firstname"]. " " . $row["lastname"]. "<br>";
        $totalPeriod = $row['total_period'];
        $wdays = $row['working_days'];
        $breaks = $row['no_of_breaks'];
        $breaks_1st = $row['1st_break_alloted'];
        $breaks_2nd = $row['2nd_break_alloted'];
        $breaks_1st_duration = $row['1st_break_duration'];
        $breaks_2nd_duration = $row['2nd_break_duration'];
        $class_duration = $row['class-duration'];
        $class_start = $row['class_start'];
    }
} else {
    echo "0 results";
}

if($wdays == 5){
    $days = array("Monday", "Tuesday", "Wednesday", "Thusday", "Friday");
}else if($wdays == 6){
    $days = array("Monday", "Tuesday", "Wednesday", "Thusday", "Friday", "Saturday");
}else{
    echo "Working days not found";
}

$period = $totalPeriod + $breaks;
$class_start2 = $class_start;
$class_duration2 =$class_duration; 
？>

<?php 
$sql_cls_sec = "SELECT DISTINCT c_id FROM subjects ORDER BY c_id DESC ";
$result_cls_sec=mysqli_query($conn, $sql_cls_sec);
$row_cls_sec=mysqli_fetch_array($result_cls_sec);
 $count_cls_sec=mysqli_num_rows($result_cls_sec);

$inserted_value = array("break", "break", "break","break","break");
$inserted_value2 = array("", "", "","","");
do{
    $xxx=$row_cls_sec['c_id'];
    $sql3 = "SELECT * FROM subjects WHERE c_id ='$xxx' ORDER BY class_teacher DESC ";
    $result3 = $conn->query($sql3);

    if ($result3->num_rows > 0) {

        // output data of each row
        // while($row3 = $result3->fetch_assoc()) {
        //    $sub_id[] = $row3['subject_id'];
        //    $w_class[] = $row3['w_c'];
        // }

        $row3 = $result3->fetch_assoc();

    }

?>

<div class="col-sm-12 mt-3">

    <h2 class="text-center">Class :- <?php echo $xxx; ?></h2>

    <div class="d-flex flex-row bd-highlight ">
    <div class="w-25 p-2 flex-fill border bd-highlight"></div>
    <?php for($i=1; $i <= $period; $i++){

      //echo "this-".$class_start2;  
      $time1 = date('h:i A', strtotime($class_start2));

      if($i == $breaks_1st+1){
          $class_duration2 = $breaks_1st_duration;
      }else if(is_numeric($breaks_2nd) && $i == $breaks_2nd+2){
          $class_duration2 = $breaks_2nd_duration;
      }else{
          $class_duration2 = $class_duration;
      }

      //$time2 = date('h:i A', strtotime($class_start)+($class_duration*60*$i));
      $time2 = date('h:i A', strtotime($time1)+($class_duration2*60));
      $class_start2 = $time2;

      ?>
    <!-- <th scope="col"><?php //echo $time1." - ".$time2 ?></th> -->
    <div class="p-2 flex-fill border bd-highlight text-center"><?php echo $time1." - ".$time2 ?></div>
  <?php } ?>
        <!-- <div class="p-2 flex-fill border bd-highlight">Flex item 1</div>
        <div class="p-2 flex-fill border bd-highlight">Flex item 2</div> -->
    </div>

    <div class="row px-3" style="height:226px; ">

        <div class="col-sm-2 p-0">
            <div class="d-flex flex-column bd-highlight mb-3">
                <?php foreach($days as $key => $value){ ?>
                <div class="border p-2 "><?php echo $value  ?></div>
                <?php } ?>
            </div>
        </div>

        <div class="col-sm-10 p-0">
            <div class="d-flex flex-column flex-wrap bd-highlight mb-3" style="height:210px;">
                <?php 
                //$counter=0;
                do{
                    $sub_id= $row3['subject'];
                    $t_id= $row3['teacher'];
                     $wk_cls=$row3['w_c'];
                     //$wc=0;
                     for($i=1; $i <= $wk_cls; $i++){
                        //for($j=1; $j <= $day; $j++){

                            //echo $sub_id."</br>";
                            $sid[] = $sub_id;
                            $tid[] = $t_id;
                            ?>
                            <!-- <div class="border p-2 "><?php //echo $sub_id ?></div> -->

                            <?php 
                    //$counter++; 
                    }
                }while($row3 = $result3->fetch_assoc()); 

                //shuffle($sid);

                array_splice( $sid, 15, 0, $inserted_value ); 
                array_splice( $sid, 30, 0, $inserted_value ); 

                array_splice( $tid, 15, 0, $inserted_value2 ); 
                array_splice( $tid, 30, 0, $inserted_value2 );

                //echo "After inserting 11 in the array is : </br>"; 
                for($s=0; $s < count($sid); $s++)  
                {
                //echo $x."</br>"; 
                ?>
                    <div class="border p-2 "><?php echo $sid[$s] ?> - <?php echo $tid[$s] ?></div>
                 <?php
                }

                ?>

            </div>
        </div>

    </div>

</div></br>
<?php

            unset($sid);
            unset($x);
            unset($tid);
            //unset($class_start2);
            $class_start2 = $class_start;

            }while($row_cls_sec=mysqli_fetch_array($result_cls_sec));
 ?>

现在，如何在另一个时间段分配一位老师？

我必须使用javascript吗？

请帮助我，谢谢。