Download Files from Remote Server DB

file_download.php

<?PHP
error_reporting(E_ALL);
ini_set('display_errors',1);

get_attachments();

if(isset($_GET['id']) && !empty($_GET['id'])){
  $id = $_GET['id'];
  $fileName = $_GET['file'];
  download_file($id,$fileName);
}
function get_attachments($id = 1){
  $url = "https://site.com/1/attachment";
  $resource = curl_init();
    curl_setopt($resource,CURLOPT_HTTPHEADER,array(
      "Site: user",
      "Requestor: vijaysinh.parmar@local",
    ));
    curl_setopt($resource, CURLOPT_URL, $url);
    curl_setopt($resource, CURLOPT_HEADER,false);
    curl_setopt($resource, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($resource,CURLOPT_SSL_VERIFYPEER ,false);
    curl_setopt($resource,CURLOPT_TIMEOUT,120);
    $res = curl_exec($resource);

    
    $decode = json_decode($res,true);
    foreach($decode as $v){
      $fileName = $v['file']['fileName'];
      $id = $v['id'];
      echo "<a target='_blank' href='download.php?id=$id&file=$fileName'>".$fileName."</a>";
      echo "<br><br>";
    }
}


  function download_file($id,$fileName){
    $url = "https://site.com/i/attachment/$id";
    $resource = curl_init();
    curl_setopt($resource,CURLOPT_HTTPHEADER,array(
      "XX-PartnerSite: user",
      "XX-Requestor: [email protected]",
    ));
    curl_setopt($resource, CURLOPT_URL, $url);
    curl_setopt($resource, CURLOPT_HEADER,false);
    curl_setopt($resource, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($resource, CURLOPT_BINARYTRANSFER, 1);
    curl_setopt($resource,CURLOPT_SSL_VERIFYPEER ,false);
    curl_setopt($resource,CURLOPT_FOLLOWLOCATION,true);
    curl_setopt($resource,CURLOPT_AUTOREFERER,true);
    curl_setopt($resource,CURLOPT_MAXREDIRS,10);
    curl_setopt($resource,CURLOPT_TIMEOUT,120);
    
    $filepath = $fileName;
    $saveTo = $fileName;
    $fp = fopen($saveTo, 'w+');
    curl_setopt($resource, CURLOPT_FILE, $fp);
    $file = curl_exec($resource);
    curl_close($resource);
    fclose($fp);
    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename="'.basename($filepath).'"');
    header('Content-Transfer-Encoding: binary');
    header('Expires: 0');
    header('Cache-Control: must-revalidate,post-check=0, pre-check=0');
    header('Pragma: public');
    header("Content-Length: " . filesize($filepath));
    header('X-Pad: avoid browser bug');
    ob_clean();
    flush();
    readfile($filepath);
    unlink($filepath);
    exit();
  }
?>