log.html
<html>
<head><title>Home Page</title></head>
<body>
<form action="login.php" method="post">
<input type="text" name="name">
<input type="submit" value="Log in">
</form>
</body>
</html>
login.php
<?php
session_start();
if (isset($_POST[‘name‘])) {
$name=$_POST[‘name‘];
$connect[email protected]new mysqli(‘localhost‘,‘root‘,‘123‘,‘mytestdb‘);
if (mysqli_connect_errno()) {
echo "Connection to database failed:".mysqli_connect_errno();
exit;
# code...
}
$query="select*from users where name=‘$name‘";
$result=$connect->query($query);
if ($result->num_rows) {
$_SESSION[‘name‘]=$name;
# code...
}
$connect->close();
# code...
}
if (isset($_SESSION[‘name‘])) {
echo "You are logged in as ".$_SESSION[‘name‘]."<br/>";
echo "<a href=‘logout.php‘>Log out</a>"."<br/>";
# code...
}else{
if (isset($name)) {
echo "Could not log in"."<br/>";
# code...
}else{
echo "You are not logged in"."<br/>";
}
}
logout.php
<?php
session_start();
unset($_SESSION[‘name‘]);
session_destroy();
if (empty($_SESSION[‘name‘])) {
echo "You have log out!";
# code...
}
时间： 2024-08-06 07:30:47