Filename Regular Expression in PHP with Named Capture

Question

I am trying to use a regex to match on a filename from the RecursiveDirectoryIterator which ends in .conf and then capture the filename and the directory (and optional sub directory it sits in).

Debugex says the capture works, but PHP is returning false, I need this to work on Windows and Linux.

I'm sure I've done something silly, any ideas what?

$indir = 'C:\Users\User\Dir1\Dir2\Dir3\Dir4\models';
$filename = 'C:\Users\User\Dir1\Dir2\Dir3\Dir4\models\product\subproduct\configuration-item.conf

// Or can be without sub product 
$filename = 'C:\Users\User\Dir1\Dir2\Dir3\Dir4\models\product\configuration-item.conf


$regex = /** @lang RegExp */ "~" . addslashes($indir) . '\\*(?P<product>[^\\/]+)[\\/]*(?P<subproduct>[^\\/]*)[\\/](?P<file>.*)\.conf~';

$result = preg_match( $regex, $filename, $matches);

You might try `([\\/])(?P[^/\r\n\\]+)\1(?P[^/\r\n\\]*)\1(?P[^/\r\n\\]*)\.conf$` https://regex101.com/r/qUJxCn/1 — The fourth bird, Mar 05 '20 at 12:44
would the function pathinfo() not be easier to use? https://www.php.net/pathinfo — Ivo P, Mar 05 '20 at 12:50
Or with the whole part and the optional sub dir https://regex101.com/r/9P27zO/1 — The fourth bird, Mar 05 '20 at 12:50
You are not getting any matches in the online tester - https://regex101.com/r/VfGbJw/1, so your regex is initially wrong. You need https://regex101.com/r/VfGbJw/2, see [PHP demo](https://3v4l.org/kqXfi) — Wiktor Stribiżew, Mar 05 '20 at 13:13
Ok, your only trouble is that you need 4 ``\``s to match a ``\``. You only used 2. — Wiktor Stribiżew, Mar 05 '20 at 13:22
Ahh yes the problem was it needed 4 \, why does it need 4 it's a bit excessive? Thank you others regex101 was also a lot more helpful than debugex — trevrobwhite, Mar 05 '20 at 13:43

Filename Regular Expression in PHP with Named Capture

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