我试图创建一个包含用户名，城市等空白的个人资料页面。我已经成功存储了用户名＆amp; MySQL数据库中使用UPDATE查询的城市。我根据用户的电子邮件设置了WHERE条件。出于测试目的，我已经使用分隔电子邮件创建了2个帐户。当我从帐号＃1登录时，输入了用户名＆amp; id，它已成功存储在正确的行中。然后我退出了，从帐号＃2登录，用户名＆amp;我在＃1帐户中输入的城市重复，打印在帐号＃2 的空白处。 但是在数据库中，数据仍然被区分，直到我按下ENTER。所以我的问题是，为什么会发生这种情况，我该如何解决这个问题？
action.php的：
<?php
session_start(); //---> start session
ini_set('display_errors', 1); ini_set('log_errors',1); error_reporting(E_ALL); mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$con = mysqli_connect('localhost', 'id1753243_venom', 'roushan123', 'id1753243_gameware_01');
if(!$con)
{
echo 'Not connected to the server';
}
$city = $_SESSION['city'];
$city = $_POST['city'];
if(isset($_POST['username']))
if(isset($_POST['city']))
{
$username = $_POST['username'];
$sql = "UPDATE users SET username='".mysqli_real_escape_string($con,$username)."', city = '$city' WHERE email='".mysqli_real_escape_string($con,$_SESSION['email'])."'";
$insert = mysqli_query($con,$sql);
$_SESSION['username'] = $username; //---> this will store username into session variable
$_SESSION['city'] = $city; //---> this will store city into session variable
}
if(!$insert)
{
echo 'Not inserted';
}
else
{
echo 'Inserted';
}
header("refresh:2; url=user.php");
?>
这是user.php：
<?php
ini_set('display_errors', 1); ini_set('log_errors',1); error_reporting(E_ALL); mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
/* Displays user information and some useful messages */
session_start();
include 'db.php';
// Check if user is logged in using the session variable
if ( $_SESSION['logged_in'] != 1 ) {
$_SESSION['message'] = "You must log in before viewing your profile page!";
header("location: error.php");
}
else {
// Makes it easier to read
$first_name = $_SESSION['first_name'];
$last_name = $_SESSION['last_name'];
$email = $_SESSION['email'];
$active = $_SESSION['active'];
$username = $_SESSION['username'];
$city = $_SESSION['city'];
}
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<link rel="icon" type="image/png" href="assets/img/favicon.ico">
<title>Social Junction | User Profile</title>
<meta content='width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0' name='viewport' />
<meta name="viewport" content="width=device-width" />
<!-- Bootstrap core CSS -->
<link href="assets/css/bootstrap.min.css" rel="stylesheet" />
<!-- Animation library for notifications -->
<link href="assets/css/animate.min.css" rel="stylesheet"/>
<!-- Light Bootstrap Table core CSS -->
<link href="assets/css/light-bootstrap-dashboard.css" rel="stylesheet"/>
<!-- CSS for Demo Purpose, don't include it in your project -->
<link href="assets/css/demo.css" rel="stylesheet" />
<!-- Fonts and icons -->
<link href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet">
<link href='//fonts.googleapis.com/css?family=Roboto:400,700,300' rel='stylesheet' type='text/css'>
<link href="assets/css/pe-icon-7-stroke.css" rel="stylesheet" />
</head>
<body>
<div class="wrapper">
<div class="sidebar" data-color="blue" data-image="http://www.zastavki.com/pictures/originals/2015/Creative_Wallpaper_Set_of_business_people_100390_.jpg">
<!-- you can change the color of the sidebar using: data-color="blue | azure | green | orange | red | purple" -->
<div class="sidebar-wrapper">
<div class="pic"></div>
<div class="logo">
<a href="#">
<span style="font-size: 28px;">Hello <span style="font-weight: bold;"><?php echo $first_name.' '.$last_name; ?>!</span></span>
</a>
</div>
<ul class="nav">
<li>
<a href="dashboard.php">
<i class="pe-7s-graph"></i>
<p>Dashboard</p>
</a>
</li>
<li class="active">
<a href="user.html">
<i class="pe-7s-user"></i>
<p>User Profile</p>
</a>
</li>
</ul>
</div>
</div>
<div class="main-panel">
<nav class="navbar navbar-default navbar-fixed">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navigation-example-2">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Profile</a>
</div>
<div class="collapse navbar-collapse">
<ul class="nav navbar-nav navbar-left">
<li>
<a href="#" class="dropdown-toggle" data-toggle="dropdown">
<i class="fa fa-dashboard"></i>
</a>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">
<i class="fa fa-globe"></i>
<b class="caret"></b>
<span class="notification">5</span>
</a>
<ul class="dropdown-menu">
<li><a href="#">Notification 1</a></li>
<li><a href="#">Notification 2</a></li>
<li><a href="#">Notification 3</a></li>
<li><a href="#">Notification 4</a></li>
<li><a href="#">Another notification</a></li>
</ul>
</li>
<li>
<a href="">
<i class="fa fa-search"></i>
</a>
</li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li>
<a href="">
Account
</a>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">
Dropdown
<b class="caret"></b>
</a>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something</a></li>
<li class="divider"></li>
<li><a href="#">Separated link</a></li>
</ul>
</li>
<li>
<a href="index.php">
Log out
</a>
</li>
</ul>
</div>
</div>
</nav>
<div class="content">
<div class="container-fluid">
<div class="row">
<div class="col-md-8">
<div class="card">
<div class="header">
<h4 class="title">Edit Profile</h4>
</div>
<div class="content">
<form method="POST" action="action.php">
<div class="row">
<div class="col-md-5">
<div class="form-group">
<label>Company (disabled)</label>
<input type="text" class="form-control" disabled placeholder="Company" value="Creative Code Inc.">
</div>
</div>
<div class="col-md-3">
<div class="form-group">
<label>Username</label>
<input name="username" type="text" class="form-control" placeholder="Username" value="<?php echo $username; ?>">
</div>
</div>
<div class="col-md-4">
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input type="email" class="form-control" placeholder="Email" value="<?php echo $email; ?>">
</div>
</div>
</div>
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label>First Name</label>
<input type="text" name="first_name" class="form-control" placeholder="Company" value="<?php echo $first_name; ?>">
</div>
</div>
<div class="col-md-6">
<div class="form-group">
<label>Last Name</label>
<input type="text" name="last_name" class="form-control" placeholder="Last Name" value="<?php echo $last_name; ?>">
</div>
</div>
</div>
<div class="row">
<div class="col-md-12">
<div class="form-group">
<label>Address</label>
<input type="text" name="address" class="form-control" placeholder="Home Address" value="Bld Mihail Kogalniceanu, nr. 8 Bl 1, Sc 1, Ap 09">
</div>
</div>
</div>
<div class="row">
<div class="col-md-4">
<div class="form-group">
<label>City</label>
<input type="text" name="city" class="form-control" placeholder="City" value="<?php echo $_SESSION['city']; ?>">
</div>
</div>
<div class="col-md-4">
<div class="form-group">
<label>Country</label>
<input type="text" name="country" class="form-control" placeholder="Country" value="Andrew">
</div>
</div>
<div class="col-md-4">
<div class="form-group">
<label>Postal Code</label>
<input type="number" class="form-control" placeholder="ZIP Code">
</div>
</div>
</div>
<div class="row">
<div class="col-md-12">
<div class="form-group">
<label>About Me</label>
<textarea name="aboutme" rows="5" class="form-control" placeholder="Here can be your description" value="Mike">Lamborghini Mercy, Your chick she so thirsty, I'm in that two seat Lambo.</textarea>
</div>
</div>
</div>
<button type="submit" class="btn btn-info btn-fill pull-right">Update Profile</button>
<div class="clearfix"></div>
</form>
</div>
</div>
</div>
<div class="col-md-4">
<div class="card card-user">
<div class="image">
<img src="https://ununsplash.imgix.net/photo-1431578500526-4d9613015464?fit=crop&fm=jpg&h=300&q=75&w=400" alt="..."/>
</div>
<div class="content">
<div class="author">
<a href="#">
<img class="avatar border-gray" src="assets/img/faces/face-3.jpg" alt="..."/>
<h4 class="title"><?php echo $first_name; ?><br />
<small><?php echo $username; ?></small>
</h4>
</a>
</div>
<p class="description text-center"> "Lamborghini Mercy <br>
Your chick she so thirsty <br>
I'm in that two seat Lambo"
</p>
</div>
<hr>
<div class="text-center">
<button href="#" class="btn btn-simple"><i class="fa fa-facebook-square"></i></button>
<button href="#" class="btn btn-simple"><i class="fa fa-twitter"></i></button>
<button href="#" class="btn btn-simple"><i class="fa fa-google-plus-square"></i></button>
</div>
</div>
</div>
</div>
</div>
</div>
<footer class="footer">
<div class="container-fluid">
<nav class="pull-left">
<ul>
<li>
<a href="#">
Home
</a>
</li>
<li>
<a href="#">
Company
</a>
</li>
<li>
<a href="#">
Portfolio
</a>
</li>
<li>
<a href="#">
Blog
</a>
</li>
</ul>
</nav>
<p class="copyright pull-right">
© 2016 <a href="http://www.creative-tim.com">Creative Tim</a>, made with love for a better web
</p>
</div>
</footer>
</div>
</div>
</body>
<!-- Core JS Files -->
<script src="assets/js/jquery-1.10.2.js" type="text/javascript"></script>
<script src="assets/js/bootstrap.min.js" type="text/javascript"></script>
<!-- Checkbox, Radio & Switch Plugins -->
<script src="assets/js/bootstrap-checkbox-radio-switch.js"></script>
<!-- Charts Plugin -->
<script src="assets/js/chartist.min.js"></script>
<!-- Notifications Plugin -->
<script src="assets/js/bootstrap-notify.js"></script>
<!-- Google Maps Plugin -->
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?sensor=false"></script>
<!-- Light Bootstrap Table Core javascript and methods for Demo purpose -->
<script src="assets/js/light-bootstrap-dashboard.js"></script>
<!-- Light Bootstrap Table DEMO methods, don't include it in your project! -->
<script src="assets/js/demo.js"></script>
</html>
我知道代码不安全，这仅用于测试目的。非常感谢帮助。