Daten prüfen mit php ajax

<div class="col-md-12 profile-rounds">
        <div class="panel panel-default panel-primary rounded-border">
         <!-- Default panel contents -->
         <div class="panel-heading">Rounds</div>               
         <!-- Table -->
         <? if($data['rounds']): ?>
         <table class="table">
            <thead>
                <tr>
                    <th width="20%">Datum</th>
                    <th width="50%">Course</th>
                    <th width="30%" class="text-right">Action</th>
                   
                </tr>
            </thead>
           
            <tbody>
           
                <?php
                    foreach($data['rounds'] as $round){
                        echo "<tr>";
                        echo "<td>" . $round->date . "</td>";
                        echo "<td>" . $round->name . "</td>";
                        echo '<td class="text-right button-action"><a class="btn btn-default" href="' . DIR . 'round/edit/' . $round->roundid . '">Edit</a>';
                        echo '<a class="btn btn-danger deleteRound" data-roundid="' . $round->roundid . '">Delete</a></td>';
                        echo "</tr>";
                    }
                ?>
            </tbody>
         </table>
         <? else: ?>
         <div class="panel-body">
                <p>No rounds entered</p>
         </div>
         <? endif; ?>
        </div>
    </div>

<script>
    $(function() {
        $(".deleteRound").click(function() {
            $post = $(this);
            swal({  
                title: "Do you want to leave this Group?",  
                //text: "You will not be able to recover this imaginary file!",  
                type: "warning",  
                showCancelButton: true,  
                confirmButtonColor: "#DD6B55",  
                confirmButtonText: "Yes, delete it!",  
                cancelButtonText: "No, cancel plx!",  
                closeOnConfirm: true,  
                closeOnCancel: true 
            }, 
            function(isConfirm){  
                if (isConfirm) { 
                    $.ajax({
                        url: '<?php echo DIR . 'round/delete'?>',
                        method: "POST",
                        data: {roundid : $post.data('roundid')},
                        success: function(msg) {
                            alert(msg);
                            $post.parent().parent().fadeOut(200);
                        }
                    });  
                } 
            });
        });
    });

</script>

if(isset($_POST['roundid'])){   
            $info = $this->_model->getRoundInfo($_POST['roundid']);
           
            if($info[0]->userid == Session::get('userid')){
                $data = array(
                    'roundid' => $_POST['roundid']   
                );
               
                $this->_model->deleteRound($data);
            } else {
                echo json_encode("Good try");
            }
        }