Here is a quick step-by-step tutorial on editing the PHP.INI file.
Login to the cPanel.
Find the File Manager in File section of the Cpanel. Review our tutorial on using the Code Editor within the File manager if you're looking on information how to use it.
Navigate to the directory where you will either save or edit the PHP.INI file and then select the file and use the Code Editor. To open the file, you can click on it to select the file and then click on the Code Editor icon in the menu bar of the File Manager. You can also right-click with your mouse and select Code Editor from the menu that appears.
Edit the section of the PHP.INI that you wish to change.
Click on SAVE CHANGES in the top right hand corner in order to save your modifications or additions to the file.