This reply from your host has nothing to do with your error, your error "The uploaded file exceeds the upload_max_filesize directive in php.ini." is related to file size limit which can be fixed by updating php.ini file as MediaStar mentioned. And that file is only accessible via SSH ( if you are on shared hosting you cant, only your host can fix/update it , and remember shared hosts only allow specific MB upload size)I contacted them , they said
To remove this warning, edit your PHP script and remove the entire line where the disabled function is mentioned or insert this line on the top of PHP script:
error_reporting(0);
But how ?