enter image description here我是PHP新手，所以请不要判断：D
我正在尝试使用编辑选项制作表格。无论我单击“编辑”按钮的哪一行，都只会加载页面最后一行的数据。我该怎么办？
$sql = "SELECT * FROM countries LIMIT " . $this_page_first_result . ',' . $results_per_page;
$result = $connection-> query($sql);
echo '<div style="text-align:center; font-weight: bold;">';
for ($page=1; $page<=$num_of_pages; $page++){
echo '<a href="index.php?page=' . $page . '">' . $page . '</a> ';
}
echo '<div><br>';
if($result-> num_rows > 0){
while($row = mysqli_fetch_assoc($result)){
$id = $row['id'];
$Name = $row['Name'];
$Area = $row['Area'];
$Population = $row["Population"];
$Phone_code = $row["Phone_code"];
echo "<tr><td><a href='cities.php?id={$row['id']}'>".$row['Name']."</a></td><td>". $row["Area"] ."</td><td>"
. $row["Population"] ."</td><td>". $row["Phone_code"] ."</td><td><button id='update-button' onclick='openEdit()'>Update</button></td><td><button id='delete-button'>Delete</button></td></tr>";
}
print_r($row);
}
else{
echo "</table><h2 style='text-align:center'>There are no countries in the database..</h2>";
}
$connection-> close();
?>
</table>
<br>
<div style="text-align:center">
<button type="button" id="close-button-edit" onclick="closeEdit()" style="display:none">Close</button>
<div id="edit_form" style="display:none; text-align:left">
<form action="edit_country.php" method="POST" class="forms">
<input type="hidden" name="id" value="<?php echo $id; ?>">
<p>Name: <input type="text" name="name" required value="<?php echo $Name; ?>"></p>
<p>Area: <input type="text" name="area" required value="<?php echo $Area; ?>"></p>
<p>Population: <input type="text" name="population" required value="<?php echo $Population; ?>"></p>
<p>Phone code: <input type="text" name="phone_code" required value="<?php echo $Phone_code; ?>"></p>
<input type="submit" name="update" value="Update">
</form>
</div>
答案 0 :(得分：0)
有两种可用于解决此问题的策略：所有php或使用JavaScript。
这需要提交来预先填写编辑表单。每个更新按钮都以普通链接的形式发送id作为GET请求（它是请求信息，而不是更改信息，因此请使用GET），PHP脚本使用该链接来填充编辑表单。
<?php
// always start with php stuff and don't issue any html until you're done
// initialization
$sortDirection = 'asc';
if(isset($_REQUEST['sortDirection'])) {
// this decouples the value from user input. It can only be 'Asc' or 'Desc'
$sortDirection = $_REQUEST['sortDirection'] == 'asc' ? 'Asc' : 'desc';
}
$rowToEdit = '';
$pdo = new PDO( ... );
// Using PDO because it is more standard
// Leaving connection details to user. See https://phpdelusions.net/pdo_examples/connect_to_mysql for tutorial
// $pdo is assumed to be the pdo object
// deal with row delete. Destructive, so will be post, and delete button will be set
if(isset ($_POST['delete']) ) {
// delete from countries where id = ?
//redirect back to self (Post, Redirect, Get pattern).
// Always do this when done working with POST submissions!
header('Location: /countries.php');
exit;
}
// deal with row update. This changes data, so use POST
if(isset($_POST['id'])) {
// update countries set ...
// redirect back to self
header('Location: /countries.php');
exit;
}
// deal with request for row to edit, use GET for info requests
if(array_key_exists('id', $_GET) {
$rowToEdit = $pdo->prepare("select * from countries where id = ?");
$rowToEdit->execute([$id]);
// fall through to show page
}
// get all country rows (Note, OK to use $sortDirection here because it is decoupled from user input)
$country = $pdo->query("SELECT * FROM countries ORDER BY NAME $sortDirection")->fetchAll(PDO::FETCH_GROUP);
// got all our data, dealt with user input, now we can present the view
?>
<html>
<head>
</head>
<body>
<h1>Countries</h1>
<a href="/countries.php?sortDirection=asc">Sort Asc</a>
<a href="/countries.php?sortDirection=desc">Sort Desc</a>
<table>
<tr>
<th>Name</th>
<th>Area</th>
<th>Population</th>
<th>Phone</th>
<th></th>
<th></th>
</tr>
<?php foreach( $country as $row): ?>
<tr>
<td><a href='cities.php?country_id=<?=$row['id']?>'><?=$row['Name']?></a></td>
<td><?=$row["Area"]?></td>
<td><?=$row["Population"]?></td>
<td><?=$row["Phone_code"]?></td>
<td> <a href='countries.php?id=<?=$row['id']?>'>Update</a> </td>
<td>
<form method="post">
<input type="hidden" name="id" value="<?=$row['id']?>" />
<button id='delete-button'>Delete</button>
</form>
</td>
</tr>
</table>
<?php if($rowToEdit): ?>
<div style="text-align:center">
<form action="countries.php" method="POST" class="forms">
<input type="hidden" name="id" value="<?= rowToEdit ['id']?>">
<input type="hidden" name="sortDirection" value="<?= $sortDirection?>">
<p>Name: <input type="text" name="name" required value="<?= $rowToEdit['Name']?>"></p>
<p>Area: <input type="text" name="area" required value="<?= $rowToEdit['Area']?>"></p>
<p>Population: <input type="text" name="population" required value="<?= $rowToEdit["Population"]?>"></p>
<p>Phone code: <input type="text" name="phone_code" required value="<?= $rowToEdit["Phone_code"]?>"></p>
<input type="submit" name="update" value="Update">
</form>
</div>
<?php endif; ?>
</body>
</html>