Function: Sanitize comma delimited strings.
Function: Check if doing ajax request.
Function: Allow HTML tags.
Filter Hook: Filter allowed HTML KSES tags.
Function: Send a array as a JSON.
Function: Highlight matching words.
Function: Truncate string but preserve full word.
Function: Get slug of base page.
Function: Get url to a file Used for enqueue CSS or JS.
Function: Check if current page is question page.