Variable with reference to array cell

[mikilugano]

I'm not sure it's possible to get array value from 'variable variable name'. This is my solution

<?php
$varname = 'matches['.$_GET['season_id'].']['.$_GET['competition_id'].']['.$_GET['phase_id'].']['.$_GET['group_id'].']';
$groupmatches = $$varname;
?>

but I got this error:

Notice: Undefined variable: matches[1][1][1][1] in...

[Weedpacket]

Wouldn't that just be

$groupmatches = $matches[$_GET['season_id']][$_GET['competition_id']....;

Assuming the thing exists?

[mikilugano]

Yes, I verified $_GET variable before.
Thank you for your help. The easiest solution is the best!