<?php

ob_start();
$host="localhost"; // Host name
$username="username"; // Mysql username
$password="password"; // Mysql password
$db_name="suffix_login"; // Database name
$tbl_name="members"; // Table name
$link = mysqli_connect("localhost", "username", "password", "suffix_login");

=
mysqli_connect("$host", "$username", "$password", "login")or die("cannot connect");
mysqli_select_db("$link" ,"$db_name")or die("cannot select DB");


$myusername=$_POST['myusernamea'];
$mypassword=$_POST['mypassworda'];


$myusername = stripslashes($myusername);
$mypassword = stripslashes($mypassword);
$myusername = mysqli_real_escape_string($link ,$myusername);
$mypassword = mysqli_real_escape_string($link ,$mypassword);

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

// Mysql_num_row is counting table row
$count=mysqli_num_rows($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['myusername'] = $myusername;
$_SESSION['mypassword'] = $mypassword;
header("location:login_success.php");
}
else {
echo "Wrong Username or Password";
}

ob_end_flush();
?>