in sending links to users according to their interests

reimei · July 27, 2011

Hi

I have 4 tables named

tbl_user(id,email) id:PK

tbl_user_interest(user_id,cat_id) user_id:FK(tbl_user) , cat_id:FK(tbl_category)

tbl_category(id,name) id:PK

tbl_link(id,cat_id,url,subject,price) id:PK , cat_id:FK(tbl_category)

Now I've got new links and want to email them to users according to their interests. My solution is this:

$sql = 'SELECT tbl_user_interest.user_id,tbl_link.id,tbl_link.cat_id,tbl_link.subject,tbl_link.price FROM tbl_user_interest INNER JOIN tbl_link ON tbl_user_interest.cat_id = tbl_link.cat_id ORDER BY tbl_user_interest.user_id';

$db = new db;
$links = $db->queryAll($sql);
$result = array();
if(!empty($links))
{
     foreach($links as $link)
     {
        	$result[$link['user_id']][$link['id']] = array('subject'=>$link['subject'],'price'=>$link['price']);
      }
      $mail = $this->setEmail();
      foreach($result as $user_id=>$info)
      {
		$body = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
				<title>my site</title>
				</head>
				<body>
				<h3>new links</h3>';
                        $sql = 'SELECT email FROM tbl_user WHERE id = \''.$user_id.'\'';
		$email = $db->queryOne($sql);
		$body .= '<ul>';
                         foreach($info as $link_id=>$link_info)
		{
					$body .= '<li><a href="'._PATH.'index.php/link/view?id='.$link_id.'" title="price: '.$link_info['price'].' " >'.$link_info['subject'].'</a></li>';
		}
		$body .= '</ul></body></html>';
		$body = eregi_replace("[\]",'',$body);
		$mail->MsgHTML($body);
		$mail->AddBCC($email['email']);
		$mail->Send();
}

But I think It's not very efficient.

I think its not necessary, but the code for "db" and "setEmail" are as the following:

class db
{
const name = 'dbname';
const host = 'localhost';
const user = 'root';
const pass = '';

private $connection;

public function __construct()
{
	$connection = $this->connect();	
}

public function connect()
{
	if(empty($this->connection))
	{
		$this->connection = new mysqli(self::host ,self::user, self::pass,self::name) or die('connection error');
	}
	return $this->connection;
}

public function queryAll($sql)
{
	$result = $this->execute($sql);
	$rows = array();
	while($row = $result->fetch_array(MYSQLI_ASSOC))
	{
		$rows[] = $row;
	}
	return $rows;
}

public function queryOne($sql)
{
	$result = $this->execute($sql);
	return $result->fetch_array(MYSQLI_ASSOC);	
}

public function execute($sql)
{
	$result = $this->connection->query($sql);
	return $result;	
}
}

private function setEmail()
{
	$mail = new PHPMailer(true);
	$mail->IsSMTP();
	$mail->SMTPAuth   = true;                  // enable SMTP authentication
	$mail->SMTPSecure = "ssl";                 // sets the prefix to the servier
	$mail->Host       = "smtp.gmail.com";      // sets GMAIL as the SMTP server
        $mail->Port       = 465;                  // set the SMTP port for the GMAIL server
	$mail->Username   = "email@gmail.com";  // GMAIL username
	$mail->Password   = "password";            // GMAIL password
	$mail->SetFrom('email@gmail.com', 'my website');
	$mail->AddReplyTo("email@gmail.com","my website");
	$mail->Subject  = "my website";
	$mail->WordWrap   = 80; // set word wrap
	$mail->IsHTML(true); // send as HTML

	return $mail;
}

Do you have any idea?

thanks in advance.

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