我正在制作一个登录系统，但是我希望他们能够退出，这让我遇到了一个大问题，我设置的cookie不想被删除，无论我尝试什么，我已经尝试了很多方法删除它。
——login。
<!DOCTYPE html>
<html>
<head>
<title>Website</title>
<link rel="stylesheet" type="text/css" href="../css/style.css"/>
</head>
<body>
<header><p> Lost Story </p></header>
<div id="nav">
<ul>
<li><a href="../index.php">Home</a></li>
<li><a href="register.php">Register</a></li>
<li><a href="../downloads.html">Downloads</a></li>
<li><a href="../forums.html">Forums</a></li>
<li><a href="../donate.html">Donate</a></li>
<li><a href="../vote.html">Vote</a></li>
<div id="right">
<?php
if(isset($_COOKIE['LoggedIn']) && !empty($_COOKIE['LoggedIn'])) {
echo "<li><a href='"logout.php'">Log Out</a></li>";
} else {
echo "<li><a href='"login.php'">Log in</a></li>";
}
?>
</div>
</ul>
</div>
<div id="content">
<?php
echo var_dump($_COOKIE['LoggedIn']);
if(isset($_COOKIE['LoggedIn']) && !empty($_COOKIE['LoggedIn'])) {
echo "<label> You are already logged in, you do not need to again. </label>";
} else {
echo "<div id='"form'">
<form action='"login.php'" method='"POST'">
<label>
<br>Username:<br>
<input type='"text'" name='"name'">
</label>
<label>
<br>Password:<br>
<input type='"password'" name='"pass'">
</label>
<label>
<br>
<input type='"submit'" name='"submit'">
</label>
</form>
</div>";
}
$LoggedIn = false;
ERROR_REPORTING(E_ALL);
include_once('dbconnection.php');
if($_SERVER['REQUEST_METHOD'] == "POST") {
$user = htmlspecialchars($_POST['name']);
$pass = htmlspecialchars($_POST['pass']);
$once = false;
if(!isset($user) || !isset($pass)) {
echo "<p> Please insert all the data </p>";
} else {
$sql = "SELECT * FROM persons";
$result = mysqli_query($mysqli, $sql);
if(mysqli_num_rows($result) > 0) {
while($row = mysqli_fetch_assoc($result)) {
if($row["username"] === $user && $row["pass"] === md5($pass)) {
echo "<br><label> Logged into " .$user . "</label>";
$once = true;
$LoggedIn = true;
setcookie("LoggedIn", $LoggedIn == true ? $user : "", time() + (86400 * 30), "/");
}
}
if($once == false ) {
echo "<br><label>No data found, please insert correct data</label>";
$once = true;
}
$once = false;
} else {
echo "No results found";
}
}
}
?>
</div>
</div>
<footer> Website copyright etc </footer>
</body>
对于logout。php，我有这个
<?php
if(isset($_COOKIE['LoggedIn']) && !empty($_COOKIE['LoggedIn'])) {
setcookie('LoggedIn', '', time()-3600, '/');
header("Location: ../index.php");
} else {
echo "no";
}
?>
我不太确定为什么它不想删除cookie，所以我希望你能帮助我。
当您想要删除cookie时，您不能直接删除它们。你必须在过去创建cookie…
<?php
// set the expiration date to one hour ago
setcookie("TestCookie", "", time() - 3600);
setcookie("TestCookie", "", time() - 3600, "/~rasmus/", "example.com", 1);
?> $past = time() - 3600;
setcookie("LoggedIn", gone, $past);
header("Location: index.php"); exit();