Question

I’m trying to pull the spotify id from a spotify uri (e.g. spotify:track:5xioIP2HexKl3QsI8JDlG8) I know this should be quite easy, but I can’t seem to get anything to validate on http://regexpal.com/.

What I have so far is:

spotify:track:[a-zA-Z0-9]{22}

But it pulls the whole string, how can I make it only pull after the colon?

Answer 1

The regular expression is fine, but you need to group the id part (with ()), so that it can be captured:

$str = "spotify:track:5xioIP2HexKl3QsI8JDlG8";
if (preg_match('/spotify:track:([a-zA-Z0-9]{22})/', $str, $re)) {
  $spotifyId = $re[1];
}

DEMO.