$content = chunk_split(base64_encode(file_get_contents($file))); $header .= "Content-Type: multipart/mixed; boundary=\"".$uid."\"\r\n\r\n"; $header .= "Content-Transfer-Encoding: base64\r\n"; $header .= "Content-Disposition: attachment; filename=\"".$file_name."\"\r\n\r\n"; $header .= "Content-type:text/plain; charset=iso-8859-1\r\n"; $header .= "Content-Transfer-Encoding: 7bit https://www.youtube.com/watch?v=zYocypr0Xig https://www.youtube.com/watch?v=Mw_ORXPoogY