$re = '/\* LIST \((?<Markers>.*)\) \"\/\" (?<folder>.*?)$/m';
$str = '* LIST (\\HasChildren) "/" INBOX/Arkabit
* LIST (\\HasNoChildren) "/" "INBOX/Arkabit/Flora (SAP)"
* LIST (\\HasNoChildren) "/" INBOX/BRW
* LIST (\\HasNoChildren) "/" INBOX/Chiptronics
* LIST (\\HasNoChildren) "/" INBOX/CRMB1.COM
* LIST (\\Marked \\HasChildren) "/" INBOX/CVA
* LIST (\\HasNoChildren) "/" INBOX/CVA/Contabilista
* LIST (\\HasNoChildren) "/" INBOX/CVA/Maxflex
* LIST (\\HasNoChildren) "/" INBOX/Decorlux
* LIST (\\HasNoChildren) "/" INBOX/Fabiano
* LIST (\\HasNoChildren) "/" INBOX/Fabielle
* LIST (\\HasNoChildren) "/" INBOX/Gamma
* LIST (\\HasNoChildren) "/" INBOX/Integrate
* LIST (\\HasNoChildren) "/" INBOX/Kelli
* LIST (\\HasNoChildren) "/" INBOX/Laborclin
* LIST (\\HasNoChildren) "/" INBOX/Macrosul
* LIST (\\HasChildren) "/" INBOX/MadeiraMadeira
* LIST (\\HasNoChildren) "/" INBOX/MadeiraMadeira/BRW
* LIST (\\HasNoChildren) "/" INBOX/MadeiraMadeira/Eglo
* LIST (\\HasNoChildren) "/" "INBOX/MadeiraMadeira/Full Fit"
* LIST (\\HasNoChildren) "/" "INBOX/MadeiraMadeira/Glass Mosaic"
* LIST (\\Marked \\HasNoChildren) "/" INBOX/MadeiraMadeira/Luciin
* LIST (\\HasNoChildren) "/" INBOX/MadeiraMadeira/Rojemac
* LIST (\\HasNoChildren) "/" "INBOX/Mercado do Alarme"
* LIST (\\Marked \\HasChildren) "/" INBOX/Stuff
* LIST (\\HasNoChildren) "/" INBOX/Stuff/Importado
* LIST (\\Marked \\HasNoChildren) "/" INBOX/Stuff/Ita&APo-
* LIST (\\Marked \\HasNoChildren) "/" INBOX/Stuff/Literal
* LIST (\\HasChildren) "/" INBOX/Stuff/News
* LIST (\\HasNoChildren) "/" INBOX/Stuff/News/Linkedin
* LIST (\\HasNoChildren) "/" INBOX/Stuff/News/Microsoft
* LIST (\\HasNoChildren) "/" INBOX/Stuff/News/SAP
* LIST (\\Marked \\HasNoChildren) "/" INBOX/Stuff/Postman
* LIST (\\HasChildren) "/" INBOX/Stuff/PrimaERP
* LIST (\\HasNoChildren) "/" INBOX/Stuff/PrimaERP/Faturas
* LIST (\\Marked \\HasNoChildren) "/" INBOX/Stuff/VSOnline
* LIST (\\HasNoChildren) "/" "INBOX/Suporte | CRMSAP"
* LIST (\\HasNoChildren) "/" INBOX/Umbler
$ OK LIST completed.
';
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