$re = '/\]\s([A-Za-z\s\-]*)(?:\s\-)?\s\d/';
$str = '[Coalgirls] Mawaru Penguindrum 11 (1280x720_Blu-ray_FLAC)
[FFF] Saenai Heroine no Sodatekata - 04 [BD][720p-AAC][28020890]
[HorribleSubs] OverLord - 01 [720p]
[HorribleSubs] The World God Only Knows - 11 [720p]
[Doki] Zero no Tsukaima - F - 05 (1280x720 Hi10P BD FLAC) [6EE7D53B]';
preg_match_all($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