Rabu, 11 Juli 2012

Login.php
<table width="300" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">
<
tr>
<
form name="form1" method="post" action="checklogin.php">
<
td>
<
table width="100%" border="0" cellpadding="3" cellspacing="1" bgcolor="#FFFFFF">
<
tr>
<
td colspan="3"><strong>Member Login </strong></td>
</
tr>
<
tr>
<
td width="78">Username</td>
<
td width="6">:</td>
<
td width="294"><input name="myusername" type="text" id="myusername"></td>
</
tr>
<
tr>
<
td>Password</td>
<
td>:</td>
<
td><input name="mypassword" type="text" id="mypassword"></td>
</
tr>
<
tr>
<
td>&nbsp;</td>
<
td>&nbsp;</td>
<
td><input type="submit" name="Submit" value="Login"></td>
</
tr>
</
table>
</
td>
</
form>
</
tr>
</
table
Cek login.php
<?php
$host="localhost"// Host name 
$username=""// Mysql username 
$password=""// Mysql password 
$db_name="test"// Database name 
$tbl_name="members"// Table name 

// Connect to server and select databse.
mysql_connect("$host""$username""$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");

// username dan password yang dikirim dari form login 
$myusername=$_POST['myusername']; 
$mypassword=$_POST['mypassword']; 

// Untuk melindungi MySQL injection (http://us.php.net/mysql_real_escape_string)
$myusername stripslashes($myusername);
$mypassword stripslashes($mypassword);
$myusername mysql_real_escape_string($myusername);
$mypassword mysql_real_escape_string($mypassword);

$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql);

// Mysql_num_row is counting table row
$count=mysql_num_rows($result);
// If result matched $myusername and $mypassword, table row must be 1 row

if($count==1){
// daftarkan $myusername, $mypassword dan diarahkan ke file "login_success.php"
session_register("myusername");
session_register("mypassword"); 
header("location:login_success.php");
}
else {
echo "Wrong Username or Password";
}
?>

Kode Php baru
<?php
ob_start();
$host="localhost"// Host name 
$username=""// Mysql username 
$password=""// Mysql password 
$db_name="test"// Database name 
$tbl_name="members"// Table name 

// Connect to server and select databse.
mysql_connect("$host""$username""$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");

// Define $myusername and $mypassword 
$myusername=$_POST['myusername']; 
$mypassword=$_POST['mypassword']; 

// To protect MySQL injection (more detail about MySQL injection)
$myusername stripslashes($myusername);
$mypassword stripslashes($mypassword);
$myusername mysql_real_escape_string($myusername);
$mypassword mysql_real_escape_string($mypassword);

$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql);

// Mysql_num_row is counting table row
$count=mysql_num_rows($result);
// If result matched $myusername and $mypassword, table row must be 1 row

if($count==1){
// Register $myusername, $mypassword and redirect to file "login_success.php"
session_register("myusername");
session_register("mypassword"); 
header("location:login_success.php");
}
else {
echo "Wrong Username or Password";
}

ob_end_flush();
?>

Buat file login_success.php.
// Cek jika session tidak terdaftar , redirect ke halaman utama. 
// Letakkan kode ini di bagian pertama halaman web anda. 
<? 
session_start();
if(!
session_is_registered(myusername)){
header("location:main_login.php");
}
?>

<html>
<body>
Buat file logout.php
// Letakkan kode ini di bagian pertama halaman web anda. 
<? 
session_start();
session_destroy();
?>
Kode Login Enkripsi
// username and password sent from form 
$myusername=$_POST['
myusername']; 
$mypassword=$_POST['
mypassword']; 

// encrypt password 
$encrypted_mypassword=md5($mypassword);

$sql="SELECT * FROM $tbl_name WHERE username='
$myusername' and password='$encrypted_mypassword";
$result=mysql_query($sql);