Wordpress admin_post or run a file from plugin - php

Question

I want to know if you can help me to get wordpress to do the same as when I just open the file online using the url and not through a function like
add_action( 'admin_post_uploadImage', 'uploadImage' );
Is there a way I can do that.
It says: fopen(uploads/916224322.jpg): failed to open stream: No such file or directory in ********\wp-content\plugins\tandhjuletodderapi\functions.php on line 135
[31-Jul-2022 16:19:09 UTC] PHP Warning: curl_setopt(): supplied argument is not a valid File-Handle resource in
Is it something else that makes it not able to.
Have looked at chmod and it works as it should. it works fine when I don't run it from a function but just through the file without any post submit.
What I had thought if I could now set the file to perform that job, without being able to open the file without an admin process
Hope it makes sense.
ini_set('memory_limit', '-1');
ini_set('max_execution_time', 1300);
function uploadImage()
{
if (isset($_POST['submitUploadImage'])) {
if (!current_user_can('manage_options')) {
echo 'Fejl du har ikke ret til at gøre denne handling';
exit;
}
if (!wp_verify_nonce($_POST['UploadBilleder_nonce'], 'UploadBilleder_nonce')) {
wp_die('Validering fejlede!!');
} else {
function multiple_download(array $urls, $save_path = 'uploads')
{
$multi_handle = curl_multi_init();
$file_pointers = [];
$curl_handles = [];
foreach ($urls as $key => $url) {
$file = $save_path . '/' . basename($url);
if(!is_file($file)) {
$curl_handles[$key] = curl_init($url);
$file_pointers[$key] = fopen($file, "x");
curl_setopt($curl_handles[$key], CURLOPT_FILE, $file_pointers[$key]);
curl_setopt($curl_handles[$key], CURLOPT_HEADER, 0);
curl_setopt($curl_handles[$key], CURLOPT_CONNECTTIMEOUT, 60);
curl_multi_add_handle($multi_handle,$curl_handles[$key]);
}
}
// Download the files
do {
curl_multi_exec($multi_handle,$running);
} while ($running > 0);
foreach ($urls as $key => $url) {
curl_multi_remove_handle($multi_handle, $curl_handles[$key]);
curl_close($curl_handles[$key]);
fclose ($file_pointers[$key]);
}
curl_multi_close($multi_handle);
}
$getFunction = new TandhjuletCSV;
$getData = $getFunction->getImageToUpload();
$getUrl = array();
$count = 0;
foreach ($getData as $key => $values) {
$count++;
$getUrl[] = $values;
if(count($getData) == $count) {
break;
}
}
multiple_big_download($getUrl);
multiple_download($getUrl);
}
wp_redirect(admin_url('options-general.php?page=cykel_visning'));
}
}
add_action( 'admin_post_uploadImage', 'uploadImage' );
Best regards
Morten