Javascript 如何在文本等于某个内容后隐藏或禁用按钮

如果text id=“Status”==YES，如何禁用或隐藏按钮id=“edit_button”

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我试着用谷歌搜索，但这里唯一能做的是，只有第一行隐藏了表中的按钮。

您遇到的问题是，您没有将该部分分解，因此可以使用

if

语句。其次，作为一个方面，您需要参数化sql。第三，您有一些无效的html，最后，正如注释中所指出的，您应该有唯一的ID。如果您有缩进，也会很有帮助：

    <?php
    $query = "SELECT * from complaintbl where username = 
   '{$_SESSION['username']}'";
    $result = mysqli_query($con,$query);
    if ($result->num_rows > 0)
    {
    while($row = $result->fetch_assoc())
    {
        echo "<tr>";
        echo "<td>".$row['complain_title']."</td>";
        echo "<td>".$row['complain_text']."</td>";
        echo "<td><input type=\"text\" id=\"Status\" class=\"form-control editField\" style=\"width:50px;\" name=\"Status\" value=\"".$row['Status']."\" readonly/></td>";
        echo '<td><a href="studenteditcomplain.php?cid='.$row['cid'].'"><button title="edit" id="edit_button" type="button" class="btn btn-default btn-sm"><span class="glyphicon glyphicon-pencil white"></span></button></a><a href="deletecomplain.php?cid=' . $row["cid"].';><button title="delete" type="button"  class="btn btn-default btn-sr"  data-confirm="Are you sure to delete this item?"><span class="glyphicon glyphicon-trash white"></span></button></a></td>';
    }
    }
    else
    {
        echo  "</table>";
        echo  '<p class="a1"><b>You have no item. Please insert item</p>';
    }
    ?>

你不想给每个文本框和每个按钮都赋予相同的ID。在ID中添加某种迭代器。所以我应该使用类？你能提供一个javascript例子吗？.旁注：你知道现在用什么来查询数据库是危险的吗？你不知道准备好的语句，或者你不在乎你是否在线使用它，然后你发现你的数据库有一天会被删除？只需将ID设置为类似“编辑按钮”的内容即可$行['cid']，所以它们都是不同的。
<table>
<?php
# You should switch to the OOP version of mysqli, it is more straight-forward when it comes to binding and overall use, in my opinion
# It would be better to create a function and include it than do this type of syntax here. It's not wrong necessarily, it's just messy and harder to read
$sql   = "SELECT * from complaintbl where username = ?";
$query = $con->prepare($sql);
$query->bind_param('s', $_SESSION['username']);
$query->execute();

if($result->num_rows > 0):
    while($row = $result->fetch_assoc()): ?>

    <tr>
        <td><?php echo $row['complain_title'] ?></td>
        <td><?php echo $row['complain_text'] ?></td>
        <td><input type="text" class="status form-control editField" style="width:50px;" name="Status" value="<?php echo $row['Status'] ?>" <?php if($row['Status'] == 'YES') echo 'readonly' ?> /></td>
        <td><a href="studenteditcomplain.php?cid=<?php echo $row['cid'] ?>"><button title="edit" type="button" class="edit_button btn btn-default btn-sm"><span class="glyphicon glyphicon-pencil white"></span></button></a><a href="deletecomplain.php?cid=<?php echo $row["cid"] ?>"><button title="delete" type="button"  class="btn btn-default btn-sr"  data-confirm="Are you sure to delete this item?"><span class="glyphicon glyphicon-trash white"></span></button></a></td>
    <!-- You need to end the row -->
    </tr>
    <?php endwhile ?>
<?php else: ?>
<!-- you should close the <b> tag -->
<p class="a1"><b>You have no item. Please insert item</b></p>
<?php endif ?>

<!-- Seems like you should end the table regardless if there are no rows -->
</table>