Get File ID from Google Drive with PHP

I have been looking for a way to extract the ID of a file in Google Drive, and well both looking for information and some similar functions, I have managed to find this, it works for me, but I hope they can polish it a little more.

    <?php
function get_drive_id_from_url($url)  {
    preg_match('/\/d\/(.+)\//', $url, $result);
    return $result[1];
}

echo get_drive_id_from_url('https://drive.google.com/file/d/FILE_ID/view?usp=sharing');
?>

Solution

If you use another delimiter than / you don't have to escape the forward slash. You can make use of \K to forget what is matched so far, followed by matching any character except /

Then assert a / directly to the right using a positive lookahead.

As this does not use a capture group, the result is in $result[0].

/d/\K[^/]+(?=/)

The pattern matches:

/d/ Match literally
\K Clear the match buffer
[^/]+ Match 1+ times any char except / (or [^/\s]+ to also not match a whitespace char)
(?=/) Positive lookahead, assert / directly to the right

See a regex demo and a PHP demo.

Example code

function get_drive_id_from_url($url)
{
    preg_match('~/d/\K[^/]+(?=/)~', $url, $result);
    return $result[0];
}

echo get_drive_id_from_url('https://drive.google.com/file/d/FILE_ID/view?usp=sharing');

Output

FILE_ID

The capture group variant of the updated pattern is:

/d/([^/]+)/

Regex demo