PHP Email Script With Multiple Emails In One $Row "Show only 1 item in the to field"

PHP
1

Hello!

Currently I have a form where the user can submit emails in a comma separated format to the $row in database $contacts. How can I set this up correctly so the user can email their contacts? As of right now the script emails everybody but just not in the correct email format. Thank You!

<?php

$formMessage = "";
$senderName = "";
$senderEmail = "";
$senderMessage = "";
if (isset($_POST['cusername']))
{

 
    // Gather the posted form variables into local PHP variables
    $senderName = $_POST['cusername'];
    $senderEmail = $_POST['cemail'];
    $senderMessage = $_POST['msg'];
    // Make sure certain vars are present or else we do not send email yet
    if (!$senderName || !$senderEmail ) {
 
         $formMessage = "The form is incomplete, please fill in all fields.";
 
    } else { // Here is the section in which the email actually gets sent

        // Run any filtering here
        $senderName = strip_tags($senderName);
        $senderName = stripslashes($senderName);
        $senderEmail = strip_tags($senderEmail);
        $senderEmail = stripslashes($senderEmail);
        $senderMessage = strip_tags($senderMessage);
        $senderMessage = stripslashes($senderMessage);
        // End Filtering
 $to = "$contacts";         

   $from = "";
        $subject = "Prospect For Property";
        // Begin Email Message Body
  $message = '<html><body>';
';

$message .= "</body></html>";
        // Set headers configurations
		 $headers = "MIME-Version: 1.0\\r\
";

      
       

$headers .= "Content-Type: text/html; charset=ISO-8859-1\\r\
";
        // Mail it now using PHP's mail function
        mail($to, $subject, $message, $headers);
        $formMessage = "Thanks, your message has been sent.";
        $senderName = "";
        $senderEmail = "";
        $senderMessage = "";
    } // close the else condition

} // close if (POST condition
?>