php Email users in database

Question

I am trying to send an email to selected users from my database. I do a select query and then use the results of email addresses to send mail the them.

Code:

 foreach($stmt->fetchAll() as $result) 
{
    $mail = $result['email'];


    //Email information

  $to_email = "$mail";
  $from_email = "myemail@mysite.com";
  $subject = "Subject";
  $comment =  "Content"
  mail($to_email, "$subject", $comment, "From: Website <" . $from_email . ">");
}

It works, but send multiple emails to each user. For eg. If there are 10 users selected, each user receives 10 emails. I know that is because the foreach , I have also tried with while . But I do not know how to fix.

Answer 1

That is not how fetchAll() works. It gets you a result-array with all lines from your query. So if you use foreach($stmt->fetchAll() as $result) you will loop multiple times over all your results. You need to fetch all results and then loop over them.

$results = $stmt > fetchAll ();
foreach (results as $result) {
...
}

Or use fetch() in your loop.

while (($result = $stmt -> fetch ()) !== false) {
...
}