I want to add option to download attach file from every request of my first API -> url: APIno1{title, id, type, filetype} but my attach files are in different API -> url: API2?id=’$ID’&type=’$TYPE’ , that API2 may response different type of base64 file (pdf or Rar or Png …) but i have file type in first api my code is:

one part of application that user click to download attach

the button from APIno1:

        foreach ($data['receptionHeader']['attachList'] as $item){
            $details .= '<tr>';
            $details .= '<input type="hidden" name="ID" value="'.$item['ID'].'">';
            $details .= '<input type="hidden" name="Type" value="'.$item['Type'].'">';
            $details .= '<input type="hidden" name="FileType" value="'.$item['FileType'].'">';
            $details .= '<input type="submit" name="Title" value="'.$count_item . '-' . $item['Title'].'" class="btn btn-primary p-1 mt-2" style="margin: 3px; padding: 3px;">';
            $details .= '</tr>';
            $count_item++;
        }

and the code to download base64 attach file:

function showFile ($ID, $Type){
    $url_req = "...ion/getFile?ID=".$ID."&Type=".$Type;

    #### دریافت اطلاعات از سرور
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url_req);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');

    $headers = array();
    $headers[] = 'Accept: application/json';
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

    $result = curl_exec($ch);
    $basedecode = base64_decode($result);
    return $basedecode;

}



if (isset($_POST['Title'])){
    if (!empty($_POST['ID']) and !empty($_POST['Type'])){
        $fileparamID = $_POST['ID'];
        $fileparamType = $_POST['Type'];
        $fileparamFileType = $_POST['FileType'];

        $fileType = "pdf";
        $decoded = showFile (112714, 2);
        $file = 'itrac-attach-download-file.'.$fileType;
        file_put_contents($file, $decoded);

        if (file_exists($file)) {
            header('Content-Description: File Transfer');
            header('Content-Type: application/octet-stream');
            header('Content-Disposition: attachment; filename="'.basename($file).'"');
            header('Expires: 0');
            header('Cache-Control: must-revalidate');
            header('Pragma: public');
            header('Content-Length: ' . filesize($file));
            readfile($file);
            exit;

        }

        }
    }

but it does not work , can anybody help me?

I didnot try anything else but my form just post but not work