Question

我正在尝试制作预订系统，并且我创建了包含列（id，officename，roomname，resstart，resend，resuser）的表保留。重新启动并重新发送是DATATIME类型。我创建了一个带有日期选择器的表单，并将其成功插入到数据库中。

这是我的PHP文件：

<?php
session_start();
include('includes/config.php');
include('includes/checklogin.php');
check_login();

$username = $_SESSION['username'];

//code for add courses
if($_POST['submit'])
{
    $officename=$_POST['officename'];
    $roomname=$_POST['roomname'];
    $startdate=$_POST['startdate'];
    $enddate=$_POST['enddate'];


    $query="insert into  reservations (officename,roomname,resstart,resend,resuser) values(?,?,?,?,?)";
    $stmt = $mysqli->prepare($query);
    $stmt->bind_param('sssss',$officename,$roomname,$startdate,$enddate,$username);
    if($stmt->execute()){
        echo"<script>alert('Your Reservation Has Been Added Successfully');</script>";
    }else{
    echo"<script>alert('Warning! You cannot Reserve this appointment');</script>";
    }
}
?>
<!doctype html>
<html lang="en" class="no-js">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1">
    <meta name="description" content="">
    <meta name="author" content="">
    <meta name="theme-color" content="#3e454c">
    <title>Make New Reservation</title>
    <link rel="stylesheet" href="css/awesome-bootstrap-checkbox.css">
    <link rel="stylesheet" href="css/style.css">
<script type="text/javascript" src="js/jquery-1.11.3-jquery.min.js"></script>
<script type="text/javascript" src="js/validation.min.js"></script>

    <!--Load Script and Stylesheet -->
    <script type="text/javascript" src="jquery.simple-dtpicker.js"></script>
    <link type="text/css" href="jquery.simple-dtpicker.css" rel="stylesheet" />
 $(document).ready(function() {
        $( "#date" ).datepicker({ dateFormat: "yy-m-d" });  
    });
</script>
</head>
<body>
    <?php include('includes/header.php');?>
    <div class="ts-main-content">
        <?php include('includes/sidebar.php');?>
        <div class="content-wrapper">
            <div class="container-fluid">

                <div class="row">
                    <div class="col-md-12">

                        <h2 class="page-title">Make New Reservation</h2>

                        <div class="row">
                            <div class="col-md-12">
                                <div class="panel panel-default">
                                    <div class="panel-heading">Make New Reservation</div>
                                    <?php echo "<h4>You Logged in As: <span>$username</span></h4>"; 

                                    ?>
                                    <div class="panel-body">
                                    <?php if(isset($_POST['submit']))
{ ?>
<p style="color: red"><?php echo htmlentities($_SESSION['msg']); ?><?php echo htmlentities($_SESSION['msg']=""); ?></p>
<?php } ?>
                                        <form method="post" class="form-horizontal">

                                            <div class="hr-dashed"></div>

                                        <div class="form-group">
                                                <label class="col-sm-2 control-label">Select Office  </label>

                                                <div class="col-sm-8">
                                                <Select name="officename" class="form-control" required>
                                                <option value="Select Office">Select Office</option>
                                                <?php

                                                $sql="select * from offices";

                                                $stmt2 = $mysqli->prepare($sql);
                                                //$stmt2->bind_param('i',$roomno);

                                                //$stmt->bind_param('i',$aid);
                                                $stmt2->execute() ;//ok
                                                $res=$stmt2->get_result();



                                                while ($row=$res->fetch_object()) {
                                                    echo "<option value=". $row->officename .">" . $row->officename . "</option>";
                                                }



                                                ?>


                                                </Select>
                                                </div>
                                                </div>


                                                <div class="form-group">
                                                <label class="col-sm-2 control-label">Select Room  </label>
                                                <div class="col-sm-8">
                                                <Select name="roomname" class="form-control" required>
                                                <option value="Select Room">Select Room</option>
                                                <?php

                                                $sql="select * from rooms";

                                                $stmt2 = $mysqli->prepare($sql);
                                                //$stmt2->bind_param('i',$roomno);

                                                //$stmt->bind_param('i',$aid);
                                                $stmt2->execute() ;//ok
                                                $res=$stmt2->get_result();



                                                while ($row=$res->fetch_object()) {
                                                    echo "<option value=". $row->roomname .">" . $row->roomname . "</option>";
                                                }



                                                ?>


                                                </Select>
                                                </div>
                                                </div>



                                                <div class="form-group">
                                                    <label class="col-sm-2 control-label">Start time and date</label>
                                                    <div class="col-sm-8">
                                                    <input type="text" autocomplete="off" name="startdate" value="" required>
                                                    <script type="text/javascript">
                                                        $(function(){
                                                            $('*[name=startdate]').appendDtpicker();
                                                        });
                                                    </script>
                                                    </div>
                                                </div>

                                                <div class="form-group">
                                                    <label class="col-sm-2 control-label">End time and date</label>
                                                    <div class="col-sm-8">
                                                    <input type="text" autocomplete="off" name="enddate" value="" required>
                                                    <script type="text/javascript">
                                                        $(function(){
                                                            $('*[name=enddate]').appendDtpicker();
                                                        });
                                                    </script>
                                                    </div>
                                                </div>



                                            <div class="col-sm-8 col-sm-offset-2">
                                            <input class="btn btn-primary" type="submit" name="submit" value="Make New Reservation">
                                            </div>
                                            </div>

                                        </form>

                                    </div>
                                </div>


                            </div>




                            </div>
                        </div>

                    </div>
                </div>  


            </div>
        </div>
    </div>

</body>

</html>

如果有用户尝试使用同一房间的已存在时间进行新预订，我希望表单可以防止插入到表中。就像在1:00到2:00保留的房间1，所以下一个用户不能在1:10到2:00注册房间1，但他可以同时注册房间2。

提前致谢。

Answer 1

从表格预约中获取请求房间号码和新预订时间的计数，并查看表格中是否存在重新开始和重新发送时间之间的记录。

如果我理解你的问题，下面两个查询中的任何一个都应该有效。

select count(1) from reservations where roomname = 'XYZ' and '17-SEP-17' between resstart and resend;

或

select count(1) from reservations where roomname = 'XYZ' and to_date('17-SEP-17') between resstart and resend;

Answer 2

防止重复的最佳方法是在数据库中创建唯一键。

ALTER TABLE reservations ADD CONSTRAINT constr_reservations UNIQUE (roomname,resstart,resend,resuser)

在这种情况下，您的代码不得更改。因为你已经抓住了插入失败

if($stmt->execute()){
        echo"<script>alert('Your Reservation Has Been Added Successfully');</script>";
    }else{

        //ROOM DUPLICATE CASE!!!

        echo"<script>alert('Warning! You cannot Reserve this appointment');</script>";
    }

防止日期和时间插入数据库

2 个答案: