PHP help - I get a blank page

//-----editpage.php---------	
<?php
ini_set('error_reporting', E_ALL);
ini_set('display_errors', 'On');
ini_set('display_startup_errors', 'On');
 
	$database = "serve_forms";
	mysql_connect("localhost", "test", "test") or die(mysql_error());
	@mysql_select_db($database) or die( "Unable to select database");
	
	include("functions.php");
	checkLogin(1 2 3);
	
	//1=> SYS ADMIN(everything plus DELETE), 2=>ADMIN(edit,view,update) 3=>ANALYST(view only)
	echo("hello");
 
?>
 
 
 
//-----functions.php-----------
<?php
	#require_once('db.php');
	
	//LEVEL ACCESS
	//1=> SYS ADMIN(everything plus DELETE), 2=>ADMIN(edit,view,update) 3=>ANALYST(view only)
	function checkLogin($role)
	{
		if(!$_SESSION['logged_in'])
		{
			$access = FALSE;
		}
		else {
			$kt = split(' ', $role);
			
			$query = mysql_query('SELECT level_access FROM tblUsers WHERE ID = "'.mysql_real_escape_string($_SESSION['user_id']).'"');
			$row = mysql_fetch_assoc($query);
			
			$access = FALSE;
					
			while(list($key,$val)=each($kt))
			{
				if($val==$row['LEVEL_access'])
				{//if the user level matches one of the allowed levels
					$access = TRUE;
				}
			}
		}
		if($access==FALSE)
		{
			header("Location: login.php");
		}
				
	}
?>