Parse error: parse error, unexpected $ in /home/www/jims-shed.freehostia.com/login-check.php on line 44

<?
require('header.php');

function checkOK($field){
if (eregi("\r",$field) || eregi("\n",$field)){
die("Invalid Input!");
}
}

$user=$_POST['username'];
checkOK($user);
$password=$_POST['password'];
checkOK($password);

if ($user == "" || $password == "") {
die("Sorry but you must enter all of the fields, please try again");

require('dbconfig.php');

$query = "SELECT username,user_password FROM phpbb_users WHERE username = '$user' OR username_clean = '$user'";

$result = mysql_query($query);

if ($result == "") {
die("invalid username");
} else {

$row = mysql_fetch_assoc($result);

$phpusername = $row['username'];
$phppassword = $row['user_password'];

if(phpbb_check_hash($password,$phppassword)) {
$_SESSION['username'] = $phpusername;
} else {
die("invalid password");
}
}

mysql_close();

echo("Login Successful!");

?>

if ($user == "" || $password == "") {
die("Sorry but you must enter all of the fields, please try again");

}
?>

<?php
require('header.php');

function checkOK($field){
   if (preg_match("\r|\n",$field)){
      die("Invalid Input!");
   }
}

$user=$_POST['username'];
checkOK($user);
$password=$_POST['password'];
checkOK($password);

if ($user == "" || $password == "") {
   die("Sorry but you must enter all of the fields, please try again");
}
  
require('dbconfig.php');

$user = mysql_real_escape_string($user);
$query = "SELECT username,user_password FROM phpbb_users WHERE username = '$user' OR username_clean = '$user'";

$result = mysql_query($query);

if ($result == "") {
   die("invalid username");
} else {
   $row = mysql_fetch_assoc($result);
  
   $phpusername = $row['username'];
   $phppassword = $row['user_password'];
  
   if(phpbb_check_hash($password,$phppassword)) {
      $_SESSION['username'] = $phpusername;
   } else {
      die("invalid password");
   }
}

mysql_close();

echo("Login Successful!");
?>

$user = mysql_real_escape_string($user);

$query = 'SELECT username,user_password FROM phpbb_users WHERE username = "' . $user . '" OR username_clean = "' . $user . ''"';