How to get the sender's mail?

Question

Typesetting

Tell me how can I get the sender's mail, if it is in this form

=?UTF-8?B?RnJlZS1QYXkg4oCTINCx0LjRgNC20LAg0YTRgNC40LvQsNC90YHQtdGA0L7Qsg==?= <[email protected]>

I need exactly what is inside <and >symbols.

Answer 1

First, there is no adaptability.

<a href="#" class="header_logo"><img <img src="https://habrastorage.org/webt/5d/45/99/5d4599f720693601078752.png" alt="logo"></a>

error, take a closer look.
block-descr__first is a strange class name, the word "block" is present everywhere. Try to come up with more appropriate entities, such as book-description.
Using BEM notation, but there are still large nestings in the styles, for example .block-book .block-title span. According to the methodology, this should not be.
The menu does not pass the content overflow test.

Answer 2

After

* { padding: 0;
     margin: 0;

you can’t even look and it’s so clear, shit

Answer 3

<?php
$header_str = '=?UTF-8?B?RnJlZS1QYXkg4oCTINCx0LjRgNC20LAg0YTRgNC40LvQsNC90YHQtdGA0L7Qsg==?= <[email protected]>';

preg_match('!<([^>]+)>!', $header_str, $out);
var_dump($out[1]); //string(22) "[email protected]"