login-fb-help.php

<?php
   /**
   * 
   */
   
$host="127.0.0.1"; // Host name
$username="root"; // Mysql username
$password=""; // Mysql password
$db_name="test"; // Database name
$tbl_name="student"; // Table name
// Connect to server and select databse.
@$con = new mysqli($host, $username, $password,$db_name);
if($con->errno)
{
	echo "Error encountered! ".$con->error;
	exit;
	//exit script.
}
// username and password sent from form
$myusername=isset($_POST['username'])? stripslashes($_POST['username']):'' ;
$mypassword=isset($_POST['password'])? stripslashes($_POST['password']):'' ;
if($mypassword&&$myusername!=null){
	//if the variables are not null 
// To protect MySQL injection (more detail about MySQL injection)
$myusername = $con->escape_string($myusername);
$mypassword = $con->escape_string($mypassword);
$sql="SELECT * FROM $tbl_name WHERE username='$myus
ername' and password='$mypassword'";
$result=$con->query($sql);
// Mysql_num_row is counting table row

// If result matched $myusername and $mypassword, table row must be 1 row
if($result->num_rows==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";
}
}else{
	echo "Submit please the form.";
}

?>