I need help to solve my problem in making a login system. why always when login is rejected, the rejection order that I made: "You are not authorized to access this page", but that when admins are not logged in, even though I have entered the correct username and password with the codingnya. thank you in advance for those who have answered my question. sorry if my english bad :-)
login_admin.php
<html>
<head>
<title>Index</title>
</head>
<body>
<center>
<form method="post" action="check_admin.php">
<table width="287" height="101" border="0" style="border:groove">
<tr valign="bottom">
<td width="109" height="35"><font size="4" face="verdana">Username</font></td>
<td width="160"><input type="text" name="username" size="20"></td>
</tr>
<tr valign="top">
<td height="34"><font size="4" face="verdana">Password</font></td>
<td><input type="password" name="password" size="20" id="password"></td>
</tr>
<tr>
<td colspan="2" align="center">
<input type="submit" name="send" value="LOGIN">
<input type="button" name="send" value="BACK" onClick="location.replace('index.php');">
</td>
</tr>
</table>
</form>
</center>
</body>
</html>
check_admin.php
<?php
include "connection.php";
$username=$_POST['username'];
$password=$_POST['password'];
$query=mysql_query("select * from admin where username='$username' && password='$password'");
$jum=mysql_num_rows($query);
if ($jum==1)
{
session_start();
$_SESSION['username']=$username;
$_SESSION['password']=$password;
header("location:admin.php");
}
else
{
?>
<script type="text/javascript">
alert('Username or Password wrong');
document.location='login_admin.php'
</script>
<?php
}
?>
admin.php
<?php
include "connection.php";
if (!isset($_SESSION['username']) && !isset($_SESSION['password']))
{
?>
<script type="text/javascript">
alert('You are not authorized to access this page');
document.location='index.php'
</script>
<?php
}
else
{
?>
<html>
<head>
<title>Admin Page</title>
<style type="text/css">
td{text-align: center}
#foto{width: 100; height: 100}
a{text-decoration: none;}
a:hover{text-decoration: underline;}
</style>
</head>
<body>
<center>
<h1>Halaman Admin</h1>
<input type="button" value="DATA 1" onClick="location.replace('data_1.php');" />
<input type="button" value="DATA 2" onClick="location.replace('data_2.php');" />
<input type="button" value="DATA 3" onClick="location.replace('data_3.php');" />
<input type="button" value="LOGOUT" onClick="location.replace('logout.php');" />
</center>
</body>
</html>
<?php
}
?>
