以下代码连接到保存客户信息的本地数据库。首先，该页面应该显示客户名称和国家/地区，但单击名称后应显示该特定客户的更多信息。
下面这段代码的问题是，无论单击哪个名称，它都只会显示第一个客户的信息。谁能看出我哪里可能出错了？我需要为每个按钮(客户名称)创建一个 ID 吗？请记住，数据库中有很多客户，我觉得每个客户的 ID 很难实现，尤其是在数据库被修改的情况下。
<DOCTYPE html!>
<html>
<head>
<link rel="stylesheet" type="text/css" href="a3.css">
</head>
<body>
<div class="nav">
<?php include 'nav.php';
?>
</div>
<?php include 'dbconfig.php';
$sql ='SELECT * FROM `customers` ORDER BY `customers`.`country` ASC';
$q = $conn->query($sql);
$q->setFetchMode(PDO::FETCH_ASSOC);
?>
<div class = "main">
<table>
<?php while ($r = $q->fetch()): ?>
<tr>
<td><button onclick = "showCustomer();"/><?php echo ($r['customerName'])?></td>
<td><?php echo ($r['country'])?></td>
</tr>
<tr id ="extra" style="display:none">
<td><?php echo ($r['customerNumber'])?></td>
<td><?php echo ($r['contactLastName'])?></td>
<td ><?php echo ($r['contactFirstName'])?></td>
<td><?php echo ($r['phone'])?></td>
<td><?php echo ($r['addressLine1'])?></td>
<td><?php echo ($r['addressLine2'])?></td>
<td><?php echo ($r['city'])?></td>
<td><?php echo ($r['state'])?></td>
<td><?php echo ($r['postalCode'])?></td>
<td><?php echo ($r['salesRepEmployeeNumber'])?> </td>
<td><?php echo ($r['creditLimit'])?></td>
</tr>
<?php endwhile; ?>
</table>
</div>
<div class="foot">
<?php include 'foot.php'; ?>
</div>
<script>
function showCustomer() {
var showForm=document.getElementById('extra');
if (showForm.style.display="none") {
showForm.style.display ="";
alert('ok');
console.log(showForm);
}
else if (showForm.style.display=""){
showForm.style.display ="none";
}
}
</script>
</body>
</html>
</DOCTYPE>
最佳答案
你所有的<tr>有相同的id="extra" 。按照建议，您需要为每个人提供不同的“id”，这就是方法:我创建了一个变量 $i (第 18 行)，在 while(第 20 行)之后立即增加，作为参数插入到 showCustomer 的调用中(第23行)，插入到id“extra”的末尾(第27行)，最后，在底部，其中函数showCustomer声明后，参数“index”被插入到id“extra”的末尾。
<DOCTYPE html!>
<html>
<head>
<link rel="stylesheet" type="text/css" href="a3.css">
</head>
<body>
<div class="nav">
<?php include 'nav.php';
?>
</div>
<?php include 'dbconfig.php';
$sql ='SELECT * FROM `customers` ORDER BY `customers`.`country` ASC';
$q = $conn->query($sql);
$q->setFetchMode(PDO::FETCH_ASSOC);
?>
<div class = "main">
<table>
<?php $i = 0;
while ($r = $q->fetch()):
$i++; // UNIQUE INDEX FOR EACH CUSTOMER.
?>
<tr>
<td><button onclick = "showCustomer('<?php echo $i;?>');"/>
<?php echo ($r['customerName'])?></td>
<td><?php echo ($r['country'])?></td>
</tr>
<tr id ="extra<?php echo $i;?>" style="display:none">
<td><?php echo ($r['customerNumber'])?></td>
<td><?php echo ($r['contactLastName'])?></td>
<td ><?php echo ($r['contactFirstName'])?></td>
<td><?php echo ($r['phone'])?></td>
<td><?php echo ($r['addressLine1'])?></td>
<td><?php echo ($r['addressLine2'])?></td>
<td><?php echo ($r['city'])?></td>
<td><?php echo ($r['state'])?></td>
<td><?php echo ($r['postalCode'])?></td>
<td><?php echo ($r['salesRepEmployeeNumber'])?> </td>
<td><?php echo ($r['creditLimit'])?></td>
</tr>
<?php endwhile; ?>
</table>
</div>
<div class="foot">
<?php include 'foot.php'; ?>
</div>
<script>
function showCustomer( index ) { // UNIQUE INDEX AS PARAMETER.
var showForm=document.getElementById('extra' + index); // USING INDEX.
if (showForm.style.display="none") {
showForm.style.display ="";
alert('ok');
console.log(showForm);
}
else if (showForm.style.display=""){
showForm.style.display ="none";
}
}
</script>
</body>
</html>
</DOCTYPE>
关于php 中的 JavaScript 函数可显示更多点击信息(数据库查询)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36725402/