I am using cPanel of my website to increase maximum upload file size for wordpress media uploads. I have used the codes(found out from google) for this purpose wp-config.php
On cpanel -> software and services -> Select PHP Version.
Choose a PHP version which not the native one (I recommend php 5.6 or last one) and you will have / see a new link "Switch To PHP Settings", click it, in PHP Settings you can set upload_max_filesize in last line , clicking on value ( default is 2M ) , and you got a dropbox with values that you can set to upload_max_filesize, and click save .