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
Since there is no php.ini file in your /public_html directory......create a new file as phpinfo.php in /public_html directory
-Type this code in phpinfo.php and save it:
-Then type yourdomain.com/phpinfo.php...you will see all the details of your configuration
-To edit that config, create another file as php.ini in /public_html directory and paste this code:
memory_limit=512M
post_max_size=200M
upload_max_filesize=200M
-And then refresh yourdomain.com/phpinfo.php and see the changes,it will be done.