array is added to email address - php

Question

i was using this codes to send newsletter to members , now the problem is that when i send emails it doesn't send . i tracked the emails in cpanel and found that the email address has the word 'array' before it . that means that when i send to 'email#domain.com' it changes to 'arrayemail#domain.com'. and this is the code :
<?php
include("../include/config.php");
include_once("../include/functions/import.php");
verify_login_admin();
$adminurl = $config['adminurl'];
$thebaseurl = $config['baseurl'];
$sql = "SELECT USERID, username, email FROM members";
$executequery = $conn->Execute($sql);
$results= $executequery->getrows();
if($_POST['submitform'] == "1")
{
if(isset($_POST['USERID']))
{
foreach($_POST['USERID'] as $key)
{
$subject = $_POST['subject'];
$sendername = $config['site_name'];
//$bodymessage = "Dear " . $_POST['username'];
//$sendmailbody = "HI". $results[$i]. $key . $results[$i].$_POST['username'] .",";
$sendmailbody .= $_POST['message'];
$sendmailbody .= "";
$from = $config['site_name'].'<'.$config['site_email'].'>';
$sendto = $results[$i]. $key.',';
mailme($sendto,$sendername,$from,$subject,$sendmailbody,$bcc);
}
}
$message = "E-Mails / Newsletters sent successfully.";
Stemplate::assign('message',$message);
}
$mainmenu = "7";
$submenu = "2";
$bodymsg = $_POST['message'];
Stemplate::assign('subject',$subject);
Stemplate::assign('bodymsg',$bodymsg);
Stemplate::assign('mainmenu',$mainmenu);
Stemplate::assign('submenu',$submenu);
Stemplate::assign('results',$results);
STemplate::display("administrator/global_header.tpl");
STemplate::display("administrator/mass_newsletter.tpl");
STemplate::display("administrator/global_footer.tpl");
?>

Answer 1

It looks like you are getting all rows from your query:
$results= $executequery->getrows();
^ plural
But you never actually loop over all rows, so $results[$i] will contain one complete row from the result set: An array containing the USERID, username and email.
And when you concatenate an array with a string, the array will result in the text array.
And that is assuming that $i is an integer but in your code it is not defined at all.
You probably want to loop over the result-set somewhere and if you use a foreach you will not need the $i variable at all:
foreach ($results as $result) {
// Build your e-mail addresses string?
...
}