$re = '/(?:(?:^edit\ \"(.+)\"$\n)(?:^set\ uuid\ ([a-f0-9]{8}\-(?:[a-f0-9]{4}\-){3}[a-f0-9]{12})$\n)(?:(?:^set\ comment\ )((?:(?!^set\ )(?:.*$\n))+)(?=^set\ ))?(?:^set\ service\ (\".+\")$\n)?(?:^set\ extip\ ((?:(?:\d{1,3}\.){3}(?:\d{1,3}))(?:\-(?:\d{1,3}\.){3}(?:\d{1,3}))?)$\n)(?:^set\ extintf\ \"(.+)\"$\n)(?:^(set\ portforward)\ (enable)$\n)?(?:^(set\ color)\ (\d{1,2})$\n)?(?:^set\ mappedip\ \"((?:(?:\d{1,3}\.){3}(?:\d{1,3}))(?:\-(?:\d{1,3}\.){3}(?:\d{1,3}))?)\"$\n)(?:^(set\ protocol)\ (.+)$\n)?(?:^(set\ extport)\ (\d{1,5}(?:\-\d{1,5})?)$\n)?(?:^(set\ mappedport)\ (\d{1,5}(?:\-\d{1,5})?)$\n)?(?:^next$\n(?:^$\n)?))/m';
$str = 'edit "VIP [DNS сервер site.com]"
set uuid abcdef01-2345-6789-abcd-ef0123456789
set comment "Публикация IP-адреса для проекта
\\"TEST\\" в ДЦ \\"Облако\\""
set service "HTTP Webserver"
set extip 100.200.254.20
set extintf "DMZ [VLAN 100]"
set portforward enable
set color 3
set mappedip "10.100.200.5"
set protocol udp
set extport 53
set mappedport 2000-65535
next
edit "VIP [NTP сервер site.com]"
set uuid abcdef01-2345-6789-abcd-ef0123456789
set comment "Публикация IP-адреса для проекта
\\"TEST\\" в ДЦ \\"Облако\\""
set service "NTP TCP Server" "NTP UDP Server"
set extip 100.200.254.20-100.200.254.21
set extintf "DMZ [VLAN 100]"
set portforward enable
set color 3
set mappedip "10.100.200.5-10.100.200.6"
set protocol udp
set extport 123
set mappedport 1000-1999
next
';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php