Automatically CC Site Admin when a Web User Signup has happended

<?php // remove this line - it's only here for code highlighting purposes
/*     EmailAdmin_plugin.php
// check the OnWebSaveUser event

These are the available variables you can use/send in the email

$mode ="new";
$userid
$username
$userpassword
$useremail
$userfullname

    $modx->invokeEvent("OnWebSaveUser",
                        array(
                            "mode"         => "new",
                            "userid"       => $key,
                            "username"     => $username,
                            "userpassword" => $password,
                            "useremail"    => $email,
                            "userfullname" => $fullname
                        ));
*/

// MODIFIABLE SETTINGS
// set up a comma delimited list of the address(s) which will receive the notifications
$recipient_email_array = array("[email protected]","[email protected]");

// set up the content of the message
$email_content_string =$userfullname." has created a new account.\n Please login to the manager and verify the account.";

// Handle event
$e = &$modx->Event;
switch ($e->name) {

case "OnWebSaveUser":
      if($mode =="new"){
          if(isset($recipient_email_array)){
            $countarray = count($recipient_email_array);
            if($countarray > 0 ){
                foreach ($recipient_email_array as $rea){

                    // send html email receipt to admin(s)
                    mail($rea, 'New Webuser Account',
                    $email_content_string,
                    "From: Admin Name <[email protected]>\n" .
                    "MIME-Version: 1.0\n" .
                    "Content-type: text/html; charset=iso-8859-1");
                 }
             }
         }
      }

      break;

default: "";

  return;
}