Question

我有一个表从数据库中提取信息，每行的最后一列是一个标记为COMPLETE的输入标记，用户可以单击该标记。我希望能够点击标签并让它更新我的数据库以更改一个布尔字段，该字段将COMPLETE从0更改为1.现在，如果我按顺序点击它们，我似乎无法更新行。所以如果我点击更新第一行，然后点击下面的几行，它将更新第二行。如果您单击该行的按钮两次，它将更新您想要的任何行，但首先它会更新您之前离开的行...

<form action='' method='POST'>
<?php

    $current_date = date("Y-m-d");
    $n = 1;
    $sql = "SELECT id, date, pname, details, time, tech FROM task WHERE task='LAB' AND complete=0 ORDER BY date DESC";
    $result = $link->query($sql);

    echo $current_date;

    echo "<table>
                <tr>
                    <th>Date</th>
                    <th>Project</th>
                    <th>Details</th>
                    <th>Start Time</th>
                    <th>Technician</th>
                </tr>";

    while ($row = $result->fetch_assoc()) {
        echo "<tr align='center'><td>" .$row["date"]. "</td><td>" .$row["pname"]. "</td><td>" 
        .$row["details"]. "</td><td>" .$row["time"]. "</td><td>" .$row["tech"]. "</td>
        <td><input type='submit' name=".$n." value='Complete' /></td></tr>";

        if (isset($_POST[$n])) {
            $id = $row["id"];
            $update = "UPDATE task SET complete = 1 WHERE task='LAB' AND id = ".$id."";
            echo $update;
            $update_result = $link->query($update);
        }
        $n++;
    }
    echo "</table>";

    $link->close();
?>

</form>

Answer 1

我注意到的一件事是你没有做好concatenation。

解答：

您可以尝试为每一行添加form，然后使用隐藏的输入字段存储id：

while ($row = $result->fetch_assoc()) {
    echo '<tr align="center">
              <td>'.$row["date"].'</td>
              <td>'.$row["pname"].'</td>
              <td>'.$row["details"].'</td>
              <td>'.$row["time"].'</td>
              <td>'.$row["tech"].'</td>
              <td>
                  <form action="" method="POST">
                      <input type="hidden" name="id" value="'.$row["id"].'">
                      <input type="submit" name="complete" value="Complete"/>
                  </form>
              </td>
          </tr>';
}

然后您可以处理表单：

if(isset($_POST["complete"])) {
    $id = $_POST["id"];
    $stmt = $link->prepare("UPDATE task SET complete = 1 WHERE task='LAB' AND id = ?");
    $stmt->bind_param("i", $id);
    $stmt->execute();
    $stmt->close();
}

第二选项：

您可以尝试使用Ajax进行无缝交易：

while ($row = $result->fetch_assoc()) {
    echo '<tr align="center">
              <td>'.$row["date"].'</td>
              <td>'.$row["pname"].'</td>
              <td>'.$row["details"].'</td>
              <td>'.$row["time"].'</td>
              <td>'.$row["tech"].'</td>
              <td>
                  <a href="#" class="btn" type="button" data-artid="'.$row["id"].'">Complete</a>
              </td>
          </tr>';
}

然后创建你的脚本（我将在这个例子中使用jQuery）。您可以将其包含在主文件的底部：

<script>
    $(document).ready(function(){ /* PREPARE THE SCRIPT */
        $(".btn").click(function(){ /* WHEN COMPLETE BUTTON IS CLICKED */

            var elem = $(this),
                id = elem.attr('data-artid'); /* GET THE ID OF THE CLICKED ELEMENT */

            $.ajax({ /* PROCESS AJAX */
                url: "process.php", /* THE FILE WHERE THE FORM WILL BE PROCESSED */
                type: "POST", /* METHOD TO BE USED */
                data: {"id":id}, /* THE DATA TO BE PASSED TO process.php */
                dataType: 'json', /* TYPE OF DATA TO BE RETURNED */
                success: function(result){ /* IF process.php IS SUCCESSFUL */
                    if(result.boolean){
                        elem.closest('tr').remove(); /* REMOVE THE ENTIRE ROW */
                    }
                }
            });
            return false; /* THIS WILL PREVENT FROM SCROLLING TO THE TOP OF THE PAGE */
        });
    });
</script>

然后处理process.php中的表单（单独的文件）：

/** INCLUDE HERE SOMEWHERE YOUR DATABASE CONNECTION **/
$boolean = false; /** DEFAULT VALUE TO BE RETURNED **/

if(!empty($_POST["id"])){
    $id = $_POST["id"];
    $stmt = $link->prepare("UPDATE task SET complete = 1 WHERE task='LAB' AND id = ?");
    $stmt->bind_param("i", $id);
    $stmt->execute();
    $stmt->close();
    $boolean = true;
} 

echo json_encode(array('boolean' => $boolean)); /* THIS WILL BE RETURNED TO THE AJAX REQUEST */

PHP和SQL按指定行更新表

1 个答案:

解答：

第二选项：