PHP - Curl Loop To Fetch Multiple Pages - Running Curl-multi

When using cURL, how would I be able to include a call inside my get_all that basically will loop through all the next_page, get and store the data and then output it to $response->data when the "next_page" parameter becomes null?

**Here is the method**:

    public function get_all()
    {
        return $response->data;
    }

**This is what $response->data is returning as of now** (The cURL code wasn't included here):

    "paginator": {
        "total": 3092,
        "per_page": 500,
        "current_page": 2,
        "last_page": 7,
        "prev_page": "https://oc.com/api/v1/employees/?page=1",
        "next_page": "https://oc.com/api/v1/employees/?page=3"
    },
    "data": [
            {
                "id": 1592,
            etc....

Here are all of my unsuccessful attempts:

        public function get_all()
        {
    
    //        $next_url = $response->paginator->next_page;
    //
    //        foreach ($response as $next => $next_page) {
    //            print_r2($next);
    //
    //            if ($next_url !== null) {
    //                $next_page = $response->data;
    //            }
    //        }
    
    //        foreach ($response as $paginator => $next_page) {
    //            if ($next_url !== null) {
    //                $return[] = $response->data;
    //            }
    //        }
    
    //        var_dump($response->paginator);
    
    //        if ($next_url !== null) {
    //            $this->get_all($path, $args, $next_url);
    //        }
    
            return $response->data;
        }

<?php
set_time_limit ( 0 );
function define_progress_callback($i) {
global $conn;

curl_setopt($conn[$i], CURLOPT_PROGRESSFUNCTION, function ($resource,$download_size, $downloaded, $upload_size, $uploaded)
{
    if($download_size > 0)
        $progress = round($downloaded / $download_size  * 100);
        echo '<script language="javascript">$(".loader").loader("setProgress", '.$progress.');</script>';
        echo str_pad("",1024," ");
        flush();
        usleep(20000);

});
}

$urls = array("http://example.com/file.mp3",
                "http:/example.com/file.mp4");
$save_to='./tmp/';
$conn = array();
$fp = array();
$mh = curl_multi_init();

    foreach ($urls as $i => $url) {
    $g = $save_to . basename($url);
    $conn[$i]=curl_init($url);
    $fp[$i]=fopen ($g, "wb");
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);    // No certificate
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
        curl_setopt ($conn[$i], CURLOPT_FILE, $fp[$i]);
    curl_setopt ($conn[$i], CURLOPT_HEADER ,0);
    curl_setopt($conn[$i],CURLOPT_CONNECTTIMEOUT,60);
    curl_setopt ($conn[$i], CURLOPT_MAXCONNECTS, 10);
    curl_setopt($conn[$i], CURLOPT_NOPROGRESS, false);
    define_progress_callback($i);
    curl_multi_add_handle ($mh,$conn[$i]);
    }

    do {
    $n=curl_multi_exec($mh,$active);
    }
    while ($active);
    foreach ($urls as $i => $url) {
    curl_multi_remove_handle($mh,$conn[$i]);
    curl_close($conn[$i]);
    fclose($fp[$i]);
    }
curl_multi_close($mh);

?>