<?php
$re = '~<a\s[^>]+\.zip[^"]*">.*?</a>$~';
$str = '<a title="" href="http://s...content-available-to-author-only...e.ru/downloads/soft.zip">bestsoft</a>';
$subst = '$0<hr />';
echo "The result of the substitution is ".$result;
PD9waHAKCiRyZSA9ICd+PGFcc1tePl0rXC56aXBbXiJdKiI+Lio/PC9hPiR+JzsKJHN0ciA9ICc8YSB0aXRsZT0iIiBocmVmPSJodHRwOi8vcy4uLmNvbnRlbnQtYXZhaWxhYmxlLXRvLWF1dGhvci1vbmx5Li4uZS5ydS9kb3dubG9hZHMvc29mdC56aXAiPmJlc3Rzb2Z0PC9hPic7CiRzdWJzdCA9ICckMDxociAvPic7CiRyZXN1bHQgPSBwcmVnX3JlcGxhY2UoJHJlLCAkc3Vic3QsICRzdHIpOwplY2hvICJUaGUgcmVzdWx0IG9mIHRoZSBzdWJzdGl0dXRpb24gaXMgIi4kcmVzdWx0Ow==