cara memebuat login.php

1. anda harus mengcreate tabelnya user and password terlebih dahulu,
2. lalu mengcreate file form_login,
3. create file check_login,
4. create file sukses,
5. create file logout

Script create table user and password:

CREATE TABLE `user` (

`id` int(10) NOT NULL auto_increment,

`username` varchar(50) NOT NULL default '',

`password` varchar(50) NOT NULL default '',

PRIMARY KEY (`id`)

) TYPE=MyISAM AUTO_INCREMENT=2 ;

-- 

-- Dumping data for table `user`

-- 

INSERT INTO `user` VALUES (1, 'admin', '1234');

script untuk mengcreate file login.php:

< ?php
echo "


Username
: 
Password
: 

";
?>

script membuat file check_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 and password sent from form
$myusername=$_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";
}
?>

script membuat sukses.php:

< ?php
session_start();
if(!session_is_registered(myusername)){
header("location:main_login.php");
}

< html>
< body>
login sukses
< /body>
< /html>
?>

script membuat file logout:

// Letakkan kode ini di baris pertama halaman web.
< ?php
session_start();
session_destroy();

?>

Posted in: Php