WordPress: Include A File In A Theme
To include a file in your WordPress theme use this code. Upload the file you want to include into the theme root directory.
WordPress: Customize Excerpt and Read More Button
You can customize the excerpt by adding the code below into the functions.php file and customizing the HTML in Line 5. The variable "$output" contains the existing excerpt content. It can be filtered or replaced completely.
WordPress: Customize Excerpt Read More String
To customize the excerpt more string (default: [...]) or to remove it completely and replace it with something else, add this code into the functions.php file.