$re = '/(?x)^\/git\/
(
.*\/
(
HEAD|
info\/refs|
objects\/
(
info\/[^\/]+|
[0-9a-f]{2}\/[0-9a-f]{38}|
pack\/pack-[0-9a-f]{40}\.
(pack|idx)
)|
git-(upload|receive)-pack
)
)
/m';
$str = '/git/sdf/HEAD
/git/blablabla/blabla/objects/info/sdfs
/git/daf/git-receive-pack';
preg_match_all($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