add_class_event.php

 <form id="signin_student" class="form-signin" method="post">
	<h4 class="form-signin-heading"><i class="icon-plus-sign"></i> Add Event</h4>
	    <input type="text" class="input-block-level datepicker" name="date_start" id="date01" placeholder="Date Start" required/>
	    <input type="text" class="input-block-level datepicker" name="date_end" id="date01" placeholder="Date End" required/>
		<input type="text" class="input-block-level" id="username" name="title" placeholder="Title" required/>
	<button id="signin" name="add" class="btn btn-info" type="submit"><i class="icon-save"></i> Save</button>
</form>
<?php
if (isset($_POST['add'])){
	$date_start = $_POST['date_start'];
	$date_end = $_POST['date_end'];
	$title = $_POST['title'];
	
	$query = mysqli_query($conn,"insert into event (date_end,date_start,event_title,teacher_class_id) values('$date_end','$date_start','$title','$get_id')")or die(mysqli_error());
	?>
	<script>
	window.location = "class_calendar.php<?php echo '?id='.$get_id; ?>";
	</script>
<?php
}
?>

		<table cellpadding="0" cellspacing="0" border="0" class="table" id="">
									
									<?php //include('move_to_school_year.php'); ?>
										<thead>
										        <tr>
												<th>Event</th>
												<th>Date</th>
												<th></th>
												
												</tr>
												
										</thead>
										<tbody>
											
                             
									<?php $event_query = mysqli_query($conn,"select * from event where teacher_class_id = '$get_id' ")or die(mysqli_error());
										while($event_row = mysqli_fetch_array($event_query)){
										$id  = $event_row['event_id'];
									?>                              
										<tr id="del<?php echo $id; ?>">
									
										 <td><?php echo $event_row['event_title']; ?></td>
                                         <td><?php  echo $event_row['date_start']; ?>
											<br>
											 <?php  echo $event_row['date_end']; ?>
										 </td>                                    
                                         <td width="40">
										 <form method="post" action="delete_class_event.php">
										 <input type="hidden" name="get_id" value="<?php echo $get_id; ?>">
										 <input type="hidden" name="id" value="<?php echo $id; ?>">
										 <button class="btn btn-danger" name="delete_event"><i class="icon-remove icon-large"></i></button>
										 </form>
										 </td>                                      
									
                             

                               
                                </tr>
                         
						 <?php } ?>
						   
                              
										</tbody>
									</table>