Log masuk tutorial forum kecil pembangunan PHP-2
Buat fail login.php
Halaman ini adalah untuk membandingkan data yang kami lalui dari halaman log masuk dengan data dalam pangkalan data
Jika salah, pengguna tidak akan dibenarkan log masuk
Kod khusus adalah seperti berikut
<?php
session_start();
header("Content-type:text/html;charset=utf-8");
$link = mysqli_connect('localhost','root','root','mybbs');//链接数据库
mysqli_set_charset($link,'utf8'); //设定字符集
$username=$_POST['username'];
$password=md5($_POST['password']);
if($username==''){
echo "<script>alert('请输入用户名');location='" . $_SERVER['HTTP_REFERER'] . "'</script>";
exit;
}
if($password==''){
echo "<script>alert('请输入密码');location='" . $_SERVER['HTTP_REFERER'] . "'</script>";
exit;
}
$sql="select id,username,password from member where username= $username"; //从数据库查询信息
$que=mysqli_query($link,$sql);
$row=mysqli_fetch_array($que);
if($row){
if($password !=($row['password']) || $username !=$row['username']){
echo "<script>alert('密码错误，请重新输入');location='login.html'</script>";
exit;
}
else{
$_SESSION['username']=$row['username'];
$_SESSION['id']=$row['id'];
echo "<script>alert('登录成功');location='index.php'</script>";
}
}else{
echo "<script>alert('您输入的用户名不存在');location='login.html'</script>";
exit;
};
?><?php
session_start();
header("Content-type:text/html;charset=utf-8");
$link = mysqli_connect('localhost','root','root','mybbs');//链接数据库
mysqli_set_charset($link,'utf8'); //设定字符集
$username=$_POST['username'];
$password=md5($_POST['password']);
if($username==''){
echo "<script>console.log('请输入用户名');location='" . $_SERVER['HTTP_REFERER'] . "'</script>";
exit;
}
if($password==''){
echo "<script>console.log('请输入密码');location='" . $_SERVER['HTTP_REFERER'] . "'</script>";
exit;
}
$sql="select id,username,password from member where username= $username"; //从数据库查询信息
$que=mysqli_query($link,$sql);
$row=mysqli_fetch_array($que);
if($row){
if($password !=($row['password']) || $username !=$row['username']){
echo "<script>console.log('密码错误，请重新输入');location='login.html'</script>";
exit;
}
else{
$_SESSION['username']=$row['username'];
$_SESSION['id']=$row['id'];
echo "<script>console.log('登录成功');location='index.php'</script>";
}
}else{
echo "<script>console.log('您输入的用户名不存在');location='login.html'</script>";
exit;
};
?>
