WebPage.php
<?php
session_start();
include 'functions.php';
?>
<html>
<head>
<title>Ecommerce</title>
<link rel="stylesheet" href="Styling.css">
</head>
<body onLoad="CheckLogin()">
<script>
function CheckLogin(){
var loggedIn = "<?php
if(isset($_SESSION['email'])){
echo 'true';
}else{
echo 'false';
} ?>"
var logout_Form = document.getElementById("logout_Form");
var login_Form = document.getElementById("login_Form");
if(loggedIn == "true"){
login_Form.style.display="none";
logout_Form.style.display = "show";
}else{
logout_Form.style.display="none";
login_Form.style.display = "show";
}
}
function LogOut(){
<?php
session_destroy();
?>
window.open('WebPage.php', '_self');
}
function Login()
{
var modal = document.getElementById('loginModal');
var btn = document.getElementById("login");
var span = document.getElementsByClassName("close")[0];
modal.style.display = "block";
span.onclick = function() {
modal.style.display = "none";
}
window.onclick = function(event) {
if (event.target == modal) {
modal.style.display = "none";
}
}
}
function SignUp()
{
var modal = document.getElementById('signModal');
var btn = document.getElementById("signUp");
var span = document.getElementsByClassName("close2")[0];
modal.style.display = "block";
span.onclick = function() {
modal.style.display = "none";
}
window.onclick = function(event) {
if (event.target == modal) {
modal.style.display = "none";
}
}
}
</script>
<div style = "background:cyan">
<font color="green"><h1><center>WELCOME</center></h1></font>
<div>
<!--Logo and Search Box-->
<form method="GET" action = "results.php">
<a href="WebPage.php"><img src = "ball.png" alt = "Logo of Website" height = "100px" width = "100px"></a>
<input type = "text" name = "user_query" placeholder="Search" size="50px" style="overflow:hidden">
<button type="Submit" name="search">Search</button>
</form>
<!--LOGIN-->
<div id="login_Form">
<button id = "login" onclick="Login()">Login</button>
<button id="signUp" onclick="SignUp()">Sign Up</button>
<div id="loginModal" class="loginModal">
<!-- Modal content -->
<div class="login-content">
<span class="close">×</span>
<p><h2>Login</h2>
<form name="login" method="POST" id="login" action="loginCheckUser.php">
<label><b>E-Mail ID: </b></label>
<input type="email" name="email" required>
<br><br>
<label><b>Password: </b></label>
<input type="password" name="pass" required>
<br><br>
<button type="submit" id="submit" name="submit">Login</button>
<a href="loginCheckSell.php"><input type="button" id="sellerLogin" value="Login as Seller"></a>
<br><br>
<input type="checkbox" checked>Remember Me
</form></p>
</div>
</div>
<div id="signModal" class="signModal">
<!-- Modal content -->
<div class="signUp-content">
<span class="close2">×</span>
<p><h2>Sign Up</h2>
<form name="signup" action="register.php" method="POST" id="signup">
<label><b>Name: </b></label>
<input type="text" name="name" required>
<br><br>
<label><b>E-Mail ID: </b></label>
<input type="email" name="email" required>
<br><br>
<label><b>Password: </b></label>
<input type="password" name="pass" required>
<br><br>
<label><b>Confirm Password: </b></label>
<input type="password" name="con_pass" required>
<br><br>
<label><b>Mobile No: </b></label>
<input type="tel" id="phoneno" name="phone" required>
<br><br>
<button type="submit" id="submit" name="submit">Register</button>
<a href="regSell.php"><button type="submit" id="subSell" name="subSell">Register as Seller</button></a>
</form></p>
</div>
</div>
</div>
<div id="logout_Form">
<div class="dropdown">
<button class="dropbtn"> <?php
echo "Hi ";
if(isset($_SESSION['email'])){
echo getName($_SESSION['email']);
}
?></button>
<div class="dropdown-content">
<a href="myAccount.php?account=a&personal=p">Account</a>
<a href="myAccount.php?orders">Orders</a>
</div>
</div>
<button name="logout" id="logout" onclick="LogOut()">Log Out</button>
</div>
</div>
</div>
<!--Categories-->
<div>
<ul id="searchMenu">
<li>
<a href="#" title="Electronics">Electronics</a></li>
           
<li>
<a href="#" title="Appliances">Appliances</a></li>
           
<li>
<a href="#" title = "Men">Men</a></li>
           
<li>
<a href="#" title="Women">Women</a></li>
</ul>
</div>
<div id="content_area">
<?php cart();?>
<div id="shopping_cart">
<span style = "float: right; font-size: 18px; padding: 5px, line-height:40px;">
Welcome <b style="color:yellow">Shopping Cart: </b>Total Items: <?php total_items();?> - Total Price: <?php total_price();?><a href="cart.php">Go to Cart</a>
</span>
</div>
<?php
$ip = getIp();
?>
<div id="products_box">
<?php
get_pro();
getCatPro();
getBrandPro();
?>
</div>
</div>
<!--Company Info-->
<div>
<ul id="CompInfo" >
<li style="background-color:red"><a href="WebPage.php">Home</a></li>
<li style="background-color:red"><a href="#">About Us</a></li>
<li style="background-color:red"><a href="#">Contact</a></li>
</ul>
</div>
</body>
</html>
模态内容提供弹出窗口。 刷新页面后，注销按钮消失，并且有登录按钮。但我希望网站具有与刷新之前相同的状态。只有1个可以登录表单或注销表单。
loginCheckUser.php
<?php session_start();?>
<html><head>
</head>
<body>
<script>
var lat =0 ;
var lon =0 ;
function getLocation() {
navigator.geolocation.getCurrentPosition(showPosition);
}
function showPosition(position) {
document.getElementById("lat").value = position.coords.latitude;
document.getElementById("lon").value = position.coords.longitude;
document.getElementById("check").value= "true";
document.getElementById("form").submit();
}
</script>
<form id="form" method="post">
<input type="hidden" id="lat" name="lat">
<input type="hidden" id="lon" name="lon">
<input type="hidden" id="check" value="">
</form>
<?php
include 'functions.php';
$email =$_POST['email'];
$pass =$_POST['pass'];
if($email && $pass){
$connect = mysqli_connect('localhost', 'root', '','test') or die("Couldn't connect to database");
$ip = getIp();
$query = mysqli_query($connect, "SELECT * FROM users WHERE email = '$email'") or die("NO query");
$numrows = mysqli_num_rows($query);
if($numrows >=1){
while($row = mysqli_fetch_assoc($query)){
$dbemail = $row['email'];
$dbpass = $row['pass'];
}
if($email == $dbemail && md5($pass) == $dbpass){
echo '<script>
getLocation();
</script>';
$latitude = $_POST['lat'];
$longitude = $_POST['lon'];
$check =$_POST['check'];
if($check=='true'){
$sql1 = "UPDATE users SET lat = '$latitude', lon = '$longitude' where email = '$email'";
mysqli_query($connect, $sql1);
}
$name="";
$q = mysqli_query($connect, "SELECT name FROM users where email = '$email'") or die("cannot get");
while($row = mysqli_fetch_assoc($q)){
$name = $row['name'];
}
$_SESSION['email'] = $email;
header("location: WebPage.php");
}else{
echo "<script type='text/javascript'>alert('Your password is incorrect');</script>";
header("location: WebPage.php");
}
}
else{
echo "<script type='text/javascript'>alert('The user Doesn't exist');</script>";
header("location: WebPage.php");
}
}
?> </body></html>
答案 0 :(得分：0)
删除此处的条件：
if (!isset($_SESSION)) {
session_start();
}
拥有session_start()的主要原因是设置会话。在此之前，$_SESSION将为空，会话永远不会被设置。并确保session_start()始终位于顶部，首先，因为它与header()函数类似。
答案 1 :(得分：0)
您必须在开始使用会话的每个页面开始会话。
更改
if (!isset($_SESSION)) {
session_start();
}
到
session_start();
Make session_start();是您使用$ _SESSION的每个页面上调用的第一件事。另外，请确保<?php