Log in script shows blank page - php

Question

This code does not seem to be working. It only shows a blank page when I click the login button. What could be the issue.
<?php
$username = mysql_real_escape_string($_POST['username']);
$password = mysql_real_escape_string($_POST['password']);
$con = mysql_connect("localhost","root","root");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("register", $con);
$query =("SELECT * FROM users WHERE username = '". $username ."' AND password = '". $password ."' LIMIT 1");
$count = mysql_num_rows($query);
if ($count == 0) {
echo 'Error: username or password wrong ';
} else {
echo "Registration Successful, redirecting";
header("refresh:3; url=login.html");
mysql_close($con)
?>

Answer 1

Use an IDE not only an Editor!
Using my IDE it showed me an error right away and it was quite easy to fix afterwards:
<?php
$username = mysql_real_escape_string($_POST['username']);
$password = mysql_real_escape_string($_POST['password']);
$con = mysql_connect("localhost","root","root");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("register", $con);
$query =("SELECT * FROM users WHERE username = '". $username ."' AND password = '". $password ."' LIMIT 1");
$count = mysql_num_rows($query);
if ($count == 0) {
echo 'Error: username or password wrong ';
} else {
echo "Registration Successful, redirecting";
}
header("refresh:3; url=login.html");
mysql_close($con);
?>
You forgot the closing curly brackets of the else part AND the semi colon in your second last line!