How to attach PDF File to Invoice

How to attach PDF File to Invoice

Hi 

I need Attach a PDF File to Invoice with the API zoho books. I created a script in PHP / Curl, but i can't attach a file. The script is this:


  1. $pdf = curl_file_create($File_with_full_path, "application/pdf");

  3. access_token();
  4. $url = "https://books.zoho.com/api/v3/invoices/".$id."/attachment?organization_id=".$OrgId;

  6. $curl = curl_init();
  7. curl_setopt_array($curl, array(
  8. CURLOPT_URL => $url,
  9. CURLOPT_RETURNTRANSFER => true,
  10. CURLOPT_ENCODING => "",
  11. CURLOPT_MAXREDIRS => 10,
  12. CURLOPT_TIMEOUT => 0,
  13. CURLOPT_FOLLOWLOCATION => false,
  14. CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  15. CURLOPT_CUSTOMREQUEST => "POST",
  16. CURLOPT_POSTFIELDS => array('attachment'=> $pdf),
  17. CURLOPT_HTTPHEADER => array(
  18. "Authorization: Zoho-oauthtoken ".$_SESSION["AccTok"],
  19. "Content-Type: application/x-www-form-urlencoded;charset=UTF-8"
  20. ),
  21. ));
  22. $response = curl_exec($curl);
  23. curl_close($curl);

I don't know what I'm doing wrong, but according to the API documentation my script would be correct, yet I only get error messages.

I would appreciate it if you could mention to me what mistake I am making