wordpress download file instead of opening in browser code example

Example 1: website download index file instead of opening in browser

inside .htaccess add a line
AddHandler application/x-httpd-php70 .php

Example 2: website download index file instead of opening in browser

Likely an incorrect mime type in your .htaccess file. I suggest going into it 
and looking for any unwanted lines similar to the below and removing them.

AddHandler application/ etc.

and also ensure your type is set as follows:

AddType text/html .html
In order to open .htaccess in cPanel: Click File Manager and make sure to tick 
Show Hidden Files (dotfiles) before clicking Go. Then the .htaccess should 
show up the location where wp (wp-admin, wp-content, wp-includes) is installed.