How would I go by Submiting a file that in the same directory as this script inside the $data. The below function is what I currently use. If you find any bugs in the current code please tell me as well 
\[code\]function post_data($site,$data){ $datapost = curl_init(); $headers = array("Expect:"); curl_setopt($datapost, CURLOPT_URL, $site); curl_setopt($datapost, CURLOPT_TIMEOUT, 40000); curl_setopt($datapost, CURLOPT_HEADER, TRUE); curl_setopt($datapost, CURLOPT_HTTPHEADER, $headers); curl_setopt($datapost, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']); curl_setopt($datapost, CURLOPT_POST, TRUE); curl_setopt($datapost, CURLOPT_POSTFIELDS, $data); curl_setopt($datapost, CURLOPT_COOKIEFILE, "cookie.txt"); ob_start(); return curl_exec ($datapost); ob_end_clean(); curl_close ($datapost); unset($datapost); }\[/code\]
\[code\]function post_data($site,$data){ $datapost = curl_init(); $headers = array("Expect:"); curl_setopt($datapost, CURLOPT_URL, $site); curl_setopt($datapost, CURLOPT_TIMEOUT, 40000); curl_setopt($datapost, CURLOPT_HEADER, TRUE); curl_setopt($datapost, CURLOPT_HTTPHEADER, $headers); curl_setopt($datapost, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']); curl_setopt($datapost, CURLOPT_POST, TRUE); curl_setopt($datapost, CURLOPT_POSTFIELDS, $data); curl_setopt($datapost, CURLOPT_COOKIEFILE, "cookie.txt"); ob_start(); return curl_exec ($datapost); ob_end_clean(); curl_close ($datapost); unset($datapost); }\[/code\]