PHP hjälp

<?php
if (mysql_connect('localhost','root','') && mysql_select_db('guestbook')){
	
	$time = time();
	$errors = array();
	
	if (isset($_POST['guestbook_name'], $_POST['guestbook_message'])){
		$name = htmlentities($_POST['guestbook_name']);
		$message = htmlentities($_POST['guestbook_message']);
		if(empty($name) || empty($message)){
			$errors[] = 'Fyll i alla fält';
		}
		if(empty ($errors)){
		$insert ="INSERT INTO `entries` VALUES ('','$time','$name','$message')";
			if(mysql_query($insert)){
			
				header('Location: '. $_SERVER['PHP_SELF']);
	
			}else{
			$errors[] = 'Något gick fel.';
			}
		}else{
			foreach($errors as $error){
				echo $error;
			}
		}
	}
	
	$entries = mysql_query("SELECT `timestamp`,`name`,`message` FROM `entries` ORDER BY `timestamp` DESC");
	
	if (mysql_num_rows($entries)==0){
		echo 'Inga medelanden';
	}else{
		while($entries_row = mysql_fetch_assoc($entries)){
			$entries_timestamp = date('Y-m-d H:i',$entries_row['timestamp']);
			$entries_name = $entries_row['name'];
			$entries_message = $entries_row['message'];
			
			echo '<p><strong>'.$entries_name.' </strong>'.$entries_timestamp.'<br>'.$entries_message.'</p>';
	}
		}
	
}else{
	echo 'Could not connect';
}
?>
<hr>
<form action="<?php echo htmlentities ($_SERVER['PHP_SELF']);?>" method="POST">
Name:<br><input type="text" name="guestbook_name" maxlength="25"><br>
Message:<br><textarea name="guestbook_message" rows="5" cols="50" maxlength="1000"></textarea><br>
<input type="submit" value="Ny">
</form>