alhemo web sit
مدير المنتدى
عدد المساهمات : 115
تاريخ التسجيل : 14/05/2010
العمر : 38
الموقع : موقع طلاب جامعة النيلين كلية علوم الحاسوب وتقانة المعلومات
alhemo
الحيمو للمونتاج والدوبلاج: | الحيمو للمونتاج والدوبلاج |  | | منتديات طلاب جامعة النيلين كلية علوم الحاسوب مركز الحرية |
 | | موضوع: PHP Login script tutorial الجمعة أغسطس 02, 2013 6:24 pm | |
| Learn to create a simple login system with php + mysql script, this tutorial is easy to follow, teach you step by step.Overview In this tutorial, we create 3 php files for testing our code.
1. main_login.php
2. checklogin.php
3. login_success.php
Steps
1. Create table "members" in database "test".
2. Create file main_login.php.
3. Create file checklogin.php.
4. Create file login_success.php.
5. Create file logout.php
If you don't know how to create database, click hereSTEP1: Create table "members" For testing this code, we need to create database "test" and create table "members".
 CREATE TABLE `members` (
`id` int(4) NOT NULL auto_increment,
`username` varchar(65) NOT NULL default '',
`password` varchar(65) NOT NULL default '',
PRIMARY KEY (`id`)
) TYPE=MyISAM AUTO_INCREMENT=2 ;--
-- Dumping data for table `members`
-- INSERT INTO `members` VALUES (1, 'john', '1234');STEP2: Create file main_login.php The first file we need to create is "main_login.php" which is a login form.  ############### Code
STEP3: Create file checklogin.php We have a login form in step 2, when a user submit their username and password, PHP code in checklogin.php will check that this user exist in our database or not. If user has the right username and password, then the code will register username and password in the session and redirect to "login_success.php". If username or password is wrong the system will show "Wrong Username or Password".############### Code
$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 $mypassword, table row must be 1 rowif($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";
}
?>
STEP4: Create file login_success.php User can't view this page if the session is not registered. ############### Code// Check if session is not registered, redirect back to main page.
// Put this code in first line of web page.
session_start();
if(!session_is_registered(myusername)){
header("location:main_login.php");
}
?>
Login Successful
STEP5: Create file Logout.php If you want to logout, create this file. The code in this file will destroy the session.
// Put this code in first line of web page.
session_start();
session_destroy();
?>
For PHP5 User - checklogin.php ############### Code
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 $mypassword, table row must be 1 rowif($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();
?> Encrypting Password - Make your Login More Secure  Read more about encrypting password here | |
|
<______download ______> 
