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<?php
ob_start();
$tbl_name="registered_members"; // Table name
include("config.php")


// 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 $mypassword, table row must be 1 row
?>
<html>
<head>
<title>Patrick's site</title>
</head>
<body>
<h1>Welcome to my site!</h1>
<?php
if($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. If you have forgotten your password, click <a href='forgot.php'>here</a>.";
}
ob_end_flush();
include("footer.php")
?>