PHP选择一个结果
[英]PHP Selecting a single result
问题描述
I created a PHP form which allows users to 
Register and Log in . 我创建了一个PHP表单，允许用户注册和登录 。 Now I created another page named View.php that will show all the registered users in my MySQL database. 现在，我创建了另一个名为View.php的页面，该页面将显示 MySQL数据库中的所有注册用户 。 The code I used was 我使用的代码是
while($row=mysqli_fetch_assoc($sql))...
and it displayed all the users successfully . 并且成功显示了所有用户 。
Now I created another PHP page which I named profile.php . 现在，我创建了另一个名为profile.php的 PHP页面。 I want to add a link from every result on view.php which will redirect to profile.php?user=(their username) . 我想从view.php的每个结果中添加一个链接 ，该链接将重定向到profile.php？user =（其用户名） 。 But I don't know how. 但是我不知道如何。
3 个解决方案
解决方案1
0 2014-04-27 11:13:41
In your view.php considering that you have a column named 'username' , change the following : please not, it's preferably to put the ID column If you want to put the id column, simply change the $row['username'] to $row['id'] and the same in the query in profile.php 考虑到您有一个名为'username'的列，请在view.php中更改以下内容：请不要，最好放置ID列。如果要放置id列，只需将$row['username']更改为$row['id']和profile.php中的查询中的相同
<?php
...
while($row=mysqli_fetch_assoc($result)) {
echo "---------------------<br/>";
echo "<b>".$row['fullname']."</b><br/>";
echo "<small><i>".$row['course']."</i></small><br/>";
echo "<small><a href = 'friends.php?user=".$row['username']."'>[View Profile]</a></small><br/>";
echo "---------------------<br/><br/>";
}
?>
And in your profile.php 并在您的profile.php中
<?php session_start();
if($_SESSION['logged_in']==false) {
header("Location:login.php");
}
include("header.php");
?>
<html>
<head>
<title>View School-Mates</title>
</head>
<body>
<center>
<h1>My School-Mates</h1>
<small>View or Add them in your Trust List</small>
<br/><br/>
<hr>
</center>
<?php
try {
$dbh = new PDO('mysql:host=localhost;dbname=test_basic', "root", "");
$stmt = $dbh->prepare("SELECT * FROM USERS WHERE username= ?");
if ($stmt->execute(array($_GET['user']))) {
while ($row = $stmt->fetch()) {
//here you will have your row with all your username data
}
}
} catch (PDOException $e) {
print "Error!: " . $e->getMessage() . "<br/>";
die();
}
?>
</body>
</html>
Please read more about PDO from here and how to do connections this is required because you get data from your $_GET variable, and thus you need to avoid for sql injection 请从此处阅读有关PDO的更多信息，以及如何进行连接，这是必需的，因为您是从$ _GET变量中获取数据的，因此需要避免进行sql注入
Hopefully this is what you wanted, if not, please let me know so i can adjust the code 希望这是您想要的，如果不需要，请告诉我，以便我可以调整代码
解决方案2
0 2014-04-27 11:13:49
I do not know the code you are using to achieve the result but having something like : 我不知道您用来实现结果的代码，但是有类似以下内容的代码：
$query = "SELECT * FROM database WHERE id=$id";
$query = mysql_query($query);
This will filter out the profile page according to the user id 这将根据用户ID过滤掉个人资料页面
解决方案3
0 已采纳 2014-04-27 11:17:32
In this line: 在这一行：
echo "<small><a href = 'profile.php?user=$them'>[View Profile]</a></small><br/>";
instead of using your fixed $them, just use $row['id']. 而不是使用固定的$ them，只需使用$ row ['id']。 Then you can fetch the user with that id in your profile.php file: 然后，您可以在profile.php文件中获取具有该ID的用户：
$id = $_GET['user'];
$sql = "SELECT * FROM users where id = $id";
Note that this code is prone to sql injection. 请注意，此代码易于进行sql注入。 I only posted it to make the idea easier to understand. 我只是发布它以使该想法更容易理解。 See here how to do it right. 看到这里如何正确做。
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