PHP wat gaat er verkeerd? (Opgelost)

<?php

$username = $_POST['username'];
$password = $_POST['password'];
     
if ($username&&$password)
{

$connect = mysql_connect("localhost", "", "") or die("Couldn't connect!");
mysql_select_db("elitecorps") or die("Couldn't find database!");

$query = mysql_query("SELECT * FROM users WHERE username='$username' AND password='$password'");

$numrows = mysql_num_rows($query);

if ($numrows!=0)
{
  
  while ($row = mysql_fetch_assoc($query))
  {
        $dbusername = $row['username'];
        $dbpassword = $row['password'];
  }
  
  // check to see if they match!
  if ($username==$dbusername&&$password==$dbpassword)
  {
     echo "You are in!";
  }
  else
      echo "Incorrect password!";
}
else
    die("That user doesn't exist!");

}
else
    die("Please enter a username and password!");


?>

<?php
 
$username = $_POST['username'];
$password = $_POST['password'];
 
if ($username&&$password)
{
 
$connect = mysql_connect("localhost", "", "") or die("Couldn't connect!");
mysql_select_db("elitecorps") or die("Couldn't find database!");
 
$query = mysql_query("SELECT * FROM users WHERE username='$username' AND password='$password'");
 
$numrows = mysql_num_rows($query);
 
if ($numrows!=0)
{
 
  while ($row = mysql_fetch_assoc($query))
  {
        $dbusername = $row['username'];
        $dbpassword = $row['password'];
  }
 
  // check to see if they match!
  if ($username==$dbusername&&$password==$dbpassword)
  {
     echo "You are in!";
  }
  else
      echo "Incorrect password!";
}
else
    die("That user doesn't exist!");
 
}
else
    die("Please enter a username and password!");
 
 
?>