insert

<?php
//insert.php
$connect = mysqli_connect("", "", "", "");
$connect->set_charset("utf8");
if(!empty($_POST))
{
 $output = '';
 $KaID = mysqli_real_escape_string($connect, $_POST["KaID"]);
    $KiID = mysqli_real_escape_string($connect, $_POST["KiID"]);
    $LID = mysqli_real_escape_string($connect, $_POST["LID"]);
    $query = "
    INSERT INTO card_chest_level_m2m(KaID, KiID, LID)
     VALUES('$KaID', '$KiID', '$LID')
    ";
    if(mysqli_query($connect, $query))
    {
     $output .= '<label class="text-success">Level Hinzugefügt</label>';
     $select_query = "SELECT * FROM card_chest_level_m2m ORDER BY m2mID";
     $result = mysqli_query($connect, $select_query);
     $output .= '
      <table class="table table-bordered">
                    <tr>
                        <th width="25%">Karte</th>
                        <th width="25%">Kiste</th>
                        <th width="25%">Level</th>
                    </tr>

     ';
     while($row = mysqli_fetch_array($result))
     {
      $output .= '
       <tr>
                         <td>' . $row["KaID"] . '</td>
                         <td>' . $row["KiID"] . '</td>
                         <td>' . $row["LID"] . '</td>
                    </tr>
      ';
     }
     $output .= '</table>';
    }
    echo $output;
}
?>