<?php
$host="mysql14.000webhost.com";
$username="a2512574_user";
$password="123hello";
$db_name="a2512574_users";
$tbl_name="Persons";

mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");

$myusername=$_POST['username'];
$mypassword=$_POST['password'];
$myusername = stripslashes($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='$mypassword'";
while ($rows = mysql_fetch_array($sql) {
$first_name = $rows['FirstName'];
$last_name = $rows['LastName']:
echo "$first_name $last_name";
}
?>