I need to upload a PDF file to my wordpress site. When I go to Upload New Media, and try uploading it, it says
FileName.pdf
You have written php.ini file properly. Just mention path of your php.ini file inside .htaccess file using suPHP_ConfigPath/home/username/public_html. Here replace username with your username mentioned in cpanel. You can refer http://www.vinaypn.com/how-to-fix-maximum-upload-size-exceeded-error-in-wordpress-running-on-shared-hosting/