无法使用SET更新SQL表值

我尝试了许多不同形式的语法，无论我使用什么，我都无法在我的SQL数据库中获取布尔值logged_in以进行更改。无法使用SET更新SQL表值

的login.php

<?php 
session_start(); 
?> 
<html> 
<body> 
    <h1>User Login Form - PHP MySQL Login System</h1> 
    <?php 
    if (!isset($_POST['submit'])){ 
    ?> 
    <!-- The HTML login form --> 
    <form action="<?=$_SERVER['PHP_SELF']?>" method="post"> 
     Username: <input type="text" name="username" /><br /> 
     Password: <input type="password" name="password" /><br /> 
     <input type="submit" name="submit" value="Login" /> 
    </form> 

    <?php 
require_once("settings.php"); 
$mysqli = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME); 
# check connection 
if ($mysqli->connect_errno) { 
echo "<p>MySQL error no {$mysqli->connect_errno} : {$mysqli->connect_error}</p>"; 
exit(); 
} 

$username = $_POST['username']; 
$password = sha1($_POST['password']); 

$sql = "SELECT * from Users WHERE username LIKE '{$username}' AND password LIKE '{$password}' LIMIT 1"; 
$result = $mysqli->query($sql); 
if ($result->num_rows == 1) { 

#update the logged_in value here 
$sql2 = "UPDATE Users SET logged_in = 1 WHERE username = '$username'"; 

$location = "contacts.php"; 
header("Location: $location"); 
} else { 
$location = "login.php"; 
header("Location: $location"); 
} 
} 
?> 
</body> 
</html>

我成功登录使用我的settings.php ：

<?php 
    # mysql db constants DB_HOST, DB_USER, DB_PASS, DB_NAME 
    const DB_HOST = 'localhost'; 
    const DB_USER = 'Timmy'; 
    const DB_PASS = 'mypassword'; 
    const DB_NAME = 'IT210'; 
?>

但LOGGED_IN值保持不变：

来源

2017-02-15 velkoon

替换$ result = $ mysqli-> query（$ sql）;用$ result = $ mysqli-> query（$ mysqli，$ sql）; – Gulshan

您的数据未提交。或者你使用自动提交？ – Massimo

@velkoon和更新$ sql2 =“更新用户SET logged_in = 1 WHERE用户名='$用户名'”;用$ sql2 = $ mysqli-> query（$ mysqli，“UPDATE Users SET logged_in = 1 WHERE username ='$ username'”）; – Gulshan

-2

试试这个

#update the logged_in value here 
$sql2 = "UPDATE Users SET logged_in = 1 WHERE username = '$username'"; 
$mysqli->query($sql2);

你缺少执行更新查询。（$ mysqli-> query（$ sql2）;）

来源

2017-02-15 05:46:41 Shefali

非常感谢！我今天没有情人节，所以是我的吗？ :) – velkoon

$sql2 = "UPDATE Users SET logged_in = 1 WHERE username = '{$username}'";

来源

2017-02-15 07:17:52

无法使用SET更新SQL表值

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