$value) { if (filter_var($value, FILTER_VALIDATE_EMAIL)) { //echo $value; $val_emails[$key] = $value; }else{ //echo 'wrong email!!!'; } } $my_meta = get_post_meta($_POST['post_id'],$_POST['meta_name'],true); $my_meta = preg_replace('/\s+/', '', $my_meta); $my_meta_array = explode(",", $my_meta); $merge = array_merge($val_emails, $my_meta_array); $merge = array_unique($merge); build_namy_metas($merge); $merge = implode(",",$merge); update_post_meta($_POST['post_id'],$_POST['meta_name'],$merge,false); function build_namy_metas($array){ delete_post_meta($_POST['post_id'], 'ref_zaproszeni_emails'); foreach ($array as $key => $value) { add_post_meta($_POST['post_id'],'ref_zaproszeni_emails',$value,false); } } add_filter( 'wp_mail_content_type', 'set_html_content_type' ); function set_html_content_type() { return "text/html"; } send_emails($_POST['post_id'], $val_emails); var_dump($val_emails); function send_emails($eventid,$emails){ // get current user info and email $userid = get_current_user_id(); $userinfo = get_userdata( $userid ); $usermail = $userinfo->user_email; // determine user credentials for use in mail if (!empty($userinfo->first_name)) { $username = $userinfo->first_name; if (!empty($userinfo->last_name)) { $userlast = $userinfo->last_name; $usercred = $username . " " . $userlast; } else { $usercred = $username; } } else { $usercred = $userinfo->user_login; } //get event url $eventurl = get_permalink( $eventid ); //get event slug $eventdata = get_post($eventid, ARRAY_A); $eventslug = $eventdata['post_name']; //get event title $eventtitle = get_the_title( $eventid ); //get site url $siteurl = site_url(); //email message template $headers = array('Content-Type: text/html; charset=UTF-8'); $headers[] = 'From: TuGramy '; $headers[] = "Reply-To:" . $usercred . "<".$usermail.">"; $subject = "[TuGramy] " . $usercred . " zaprasza Cię na " . $eventtitle; $message = "Twój znajomy " . $usercred . " zaprosił Cię do udziału w wydarzeniu " . $eventtitle . ""; //work on email array foreach ($emails as $to) { wp_mail( $to, $subject, $message, $headers ); } }