Overview:
There may be times when you find that the default PHP settings in your cPanel account are not suited to the specific needs of your website, and you may need to adjust things like how much memory the site is allowed to use, or how large a file can be that you're allowed to upload.
These settings can easily be adjusted in the Select PHP Version interface within your cPanel account.
Method:
Log into your cPanel account.
Navigate to the "Select PHP Version" tool in the "Software" category.
Go to the "Options" tab at the top of the page.
You will see a list of options and variables and you can make changes to these options.