Question

求一个简单的php登录页面代码，只需要用户名和密码与数据库中表里面的信息相同就可以登录的页面代码

Answer 1

error_reporting(0);
$mysql_servername = "localhost";
$mysql_username = "数据库用户名";
$mysql_password ="密码";
$mysql_database ="数据库名";
mysql_connect($mysql_servername , $mysql_username , $mysql_password);
mysql_select_db($mysql_database);

$name=$_POST['user_name'];
$passowrd=$_POST['user_password'];

if ($name && $passowrd){
$sql = "SELECT * FROM admin WHERE name = '$name' and password='$passowrd'";
$res = mysql_query($sql);
$rows=mysql_num_rows($res);
if($rows){
header("location='主页'");
exit;
}
echo "<script language=javascript>alert('用户名密码错误');history.back();</script>";
}else {
echo "<script language=javascript>alert('用户名密码不能为空');history.back();</script>";
}