Problems with curl - response

This problem might not be a problem with ISPConfig, but I'm desperatly looking for some advices:
I migrated ISPConfig 3.2.11p2 on Ubuntu 20.04 LTS with PHP7.4 as default
ISPConfig 3.2.11p2 on Ubuntu 22.04 LTS with PHP8.1

I have a script that fetches mailadresses from an external provider and adjustes ISPC forwarding groups. This just won't work anymore on the new server.

My call

Code:

$memberIds = getData($domain . "/api/1/member?filter=" . $filter[$i] . "&order=`E-Mail` ASC&apikey=" . $apiKey)["objects"];

calls

Code:

function getData($url) {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_URL,$url);
    $result=curl_exec($ch);
    curl_close($ch);
    return json_decode($result, true);
}

which returns nothing (just empty, no array or anything) on the new server, but does return on the old one.

The URL itself returns

Code:

{"objects":[3243,20264,3084,19037,104,118,13574,13990,91,17029,497,7401,14576,13421,1323,12782,124,17417,99,16834,19038,5230,12787,13946,12781,119,92,20233,125,120,117]}

on the old server getData returns
3243,20264,3084,19037,104,118,13574,13990,91,17029,497,7401,14576,13421,1323,12782,124,17417,99,16834,19038,5230,12787,13946,12781,119,92,20233,125,120,117
on the new one the array is just empty
I have no idea what it could be: Any help very welcome!!!
I already tried switching PHP from 8.1 to 7.4 with same result.

One thing: Fetching the forwarding adresses in ISPC had also a problem:
I had to adjust

Code:

$mail_forward_record = $client->mail_forward_get($session_id, array('source' => '[email protected]'));
$mail_forward_record[0][destination]

to

Code:

$mail_forward_record[0]['destination']

--> does this help?

 

Found it out by adding this to getData

PHP:

if(curl_errno($ch)){
        echo 'URL: ' . $url . '<br>';
        echo 'Curl error: ' . curl_errno($ch) .' '. curl_error($ch) .'<br>';
}

--> this returned 3 and pointed to the URL containing a space!!!

Code:

order=`E-Mail` ASC&apikey