Question

我一直试图解决我的这个问题2天了，我再也想不出别的了。
第126,129和132行的未定义变量。
我一直试图使用isset或empty来稍微提高输出，但它似乎不起作用。

希望你们能帮助我：）

<body>
    <head>
        <script src="js/jquery.js"></script>
        <script src="js/bootstrap.min.js"></script>
        <script src="js/smoothscroll.js"></script>
        <script src="js/resetOnClick.js"></script>

        <link href="css/bootstrap.min.css" rel="stylesheet"/>
        <link href="css/styles.css" rel="stylesheet"/>  
        <link href="css/notifbox.css" rel="stylesheet"/>
    </head>

    <center><label class="control-label" style="font-size:30px">Reservation</label></center>
    <center><label class="control-label" style="font-size:15px">Edit Record</label></center>
    <br/>
    <br/>

    <?php
    //$id = isset($_GET['id'])? $_GET['id'] : "";
    if(isset($_POST['editreservation']))
    {
        include('config/config1.php');
        $rsvtn = $_POST['editreservation'];
        $sel = "SELECT venue.venue_type, reservation.reservation_date, reservation.reservation_time
        FROM venue
        INNER JOIN reservation ON reservation.Venue_idVenue = venue.idVenue where idReservation = '2';";
        $query = mysqli_query($conn,$sel);
        echo $sel;
        if(!$editreservation)
{
    printf("Error: %s\n", mysqli_error($conn));
    exit();
}

        while($detail = mysqli_fetch_array($query))
        {   
            $rid = $detail['idReservation'];
            $ven = $detail['venue_type'];
            $res_t = $detail['reservation_date'];
            $res_d = $detail['reservation_time'];
            echo $ven;
    ?>

    <form class="form-horizontal form-label-left" method="post">

        <div class="form-group">
                <!--BACK Button-->
                <a href="Reservation Records.php" class="col-md-6 col-md-offset-3" style="font-size:20px">Back</a>
                <!--BACK Button-->
        </div>
        <!--<input type="hidden" name="submitted" value="true"/>-->
            <div class="item form-group">
                <label class="control-label col-md-3 col-sm-3 col-xs-12">Venue<span class="required">*</span></label>
                    <div class="col-md-6 col-sm-6 col-xs-12">
                        <input id="venue_type" data-content="<?php echo $ven;?>" class="form-control col-md-7 col-xs-12" name="venue_type" placeholder="Venue" required="required" type="text" value="<?php echo $ven;?>">
                    </div>          
            </div>

            <div class="item form-group">
                <label class="control-label col-md-3 col-sm-3 col-xs-12" for="name">Reservation Date<span class="required">*</span>
                </label>
                <div class="col-md-6 col-sm-6 col-xs-12">
                    <input id="reservation_date" data-content="<?php echo $res_d;?>" class="form-control col-md-7 col-xs-12" name="reservation_date" placeholder="Reservation Date" required="required" type="date" value="<?php echo $res_d;?>">
                </div>
            </div>

            <div class="item form-group">
                <label class="control-label col-md-3 col-sm-3 col-xs-12" for="name">Reservation Time<span class="required">*</span></label>
                <div class="col-md-6 col-sm-6 col-xs-12">
                    <input id="reservation_time" data-content="<?php echo $res_t;?>" class="form-control col-md-7 col-xs-12" name="reservation_time" placeholder="Reservation Time" required="required" type="time" value="<?php echo $res_t;?>">
                </div>
            </div>



            <div class="ln_solid"></div>
            <div class="form-group">
                <div class="col-md-6 col-md-offset-3">
                    <input type="hidden" name="updRsvtn" value="<?php echo $detail['idReservation'];?>">
                    <input type="submit" class="btn btn-primary submits" value="Save Edited" onClick="Reservation Records.php" >
                </div>
            </div>  
            <?php
        } 
    }   
    ?>
    <?php
    if(isset($_POST['updRsvtn']))
        {   
            include('config/config1.php');



            $ven = $_POST['venue_type'];
            $res_d = $_POST['reservation_date'];
            $res_t = $_POST['reservation_time'];



            if(!mysqli_query($conn,"UPDATE reservation, venue SET venue_type = '$ven', reservation_date = '$res_d', reservation_time = '$res_t' WHERE idReservation = '$id'"))
            {
                echo "Not Queried: Wrong variables !";
            }   
            else
            {
                header("Location: Reservation Records.php");

            }
            mysqli_close($conn);
        }
    ?>  
    </form>

    <table class = "notif pos">
      <thead>
        <tr>
          <th><center/><b>*Old Record</b></th>
        </tr>
      </thead>

      <tbody>
        <tr>
          <td><center/><?php echo $ven;?></td>
        </tr>
        <tr>
          <td><center/><?php echo $res_d;?></td>
        </tr>
        <tr>
          <td><center/><?php echo $res_t;?></td>
        </tr>
      </tbody>
    </table>


</body>

Answer 1

其中一个未定义的变量是，我假设$editreservation。如果我们查看一些剪切代码，请执行以下操作：

if(isset($_POST['editreservation'])){
    //$_POST['editreservation'] is set!
    $rsvtn = $_POST['editreservation'];
    //$rsvtn is set
    if(!$editreservation){
        //$editreservation has *not* been set by your code.
    }
}

由于$editreservation尚未在任何地方声明，因此您会收到未定义的变量通知。

Answer 2

变量不是＆＃34;设置＆＃34;在那一点（范围）。如果您只想传递该错误，请尝试：

<td><center/><?php echo isset($ven) ? $ven : '' ?></td>
<td><center/><?php echo isset($res_d) ? $res_d : '' ?></td>
<td><center/><?php echo isset($res_t) ? $res_t : '' ?></td>

Answer 3

如果您想避免错误，请尝试此操作

<tr>
    <td><center/><?php echo @$ven; ?></td>
</tr>
<tr>
    <td><center/><?php echo @$res_d; ?></td>
</tr>
<tr>
    <td><center/><?php echo @$res_t; ?></td>
</tr>

现在用您的代码替换上面的部分并检查。

即使使用isset

3 个答案: