javascript - 如何在字段为空时使用类隐藏 DIV？

Question

我的页面上有一个 PHP While 语句。我想为每条具有空字段 $rows['deal']; 的记录隐藏具有 class 名称“coupon”的 DIV。这就是我的代码目前的样子。我该如何改变才能做到这一点。非常感谢!!!

<?php while ($rows = mysql_fetch_array($query)) { ?>        <!-- QUERY FOR PAGE 1 RECORDS -->
<div id="main">
<div id="client_name"><?php echo $rows['client_name']; ?></div>
<div id="phone"><?php echo $rows['phone']; ?></div>
<div id="client_square"></div>
<div id="client_rectangle"></div>
<img id="client_img" src="<?php echo $rows['client_img']; ?>">
<a id="edit" href="update_edit.php?id=<?php echo $rows['id']; ?>"><img id="edit_img" src="images/edit_record.png"></a>
<span class="coupon" id="cash_img"></span><span class="coupon" id="deal_text"><?php echo $rows['deal']; ?></span>
</div>
<?php } ?>  

Answer 1

你可以这样做:

<?php if($rows['deal']){ ?>
<span class="coupon" id="cash_img"></span><span class="coupon" id="deal_text"><?php echo $rows['deal']; ?></span>
<?php } ?>

完整代码

<?php while ($rows = mysql_fetch_array($query)) { ?>        <!-- QUERY FOR PAGE 1 RECORDS -->
<div id="main">
<div id="client_name"><?php echo $rows['client_name']; ?></div>
<div id="phone"><?php echo $rows['phone']; ?></div>
<div id="client_square"></div>
<div id="client_rectangle"></div>
<img id="client_img" src="<?php echo $rows['client_img']; ?>">
<a id="edit" href="update_edit.php?id=<?php echo $rows['id']; ?>"><img id="edit_img" src="images/edit_record.png"></a>
<?php if($rows['deal']){ ?>
<span class="coupon" id="cash_img"></span><span class="coupon" id="deal_text"><?php echo $rows['deal']; ?></span>
<?php } ?>
</div>
<?php } ?>