PHP quota on server

[JR212]

Hi, Can someone gives me an idea how to get the quotasize on a synology server. The server works with apache 2.4 and php 7.4. I can use exec commands I know disk_free_space and disk_total_space but those commands don't look at quota. Jan I've been lookking with

$pad = '/volume5/web';
foreach (array(
'quota -u jan',
'df',
'du'
) as $cmd) {
echo $cmd . '
';
passthru($cmd);
echo '

---

';
}
$used = exec("du -c -a $pad");

echo 'used: ' . $used . '
';
echo 'quota: ' . exec("quota -u jan") . '
';

$var = exec("cat " . pad . " | grep domz | tail -n 1 | awk '{print $4}'");
echo 'var: ' . $var . '
';

But so far no luck :(