Extract #Hashtags from Titles and Content for WordPress

I’ve been using IFTTT since 2013 and use it to import posts from my Instagram account into artlung.com for safekeeping. One aspect of that is hashtags, which mostly I’ve imported manually and in batches over the years. Based on WordPress HashTags by Matthias Pfefferle I was able to build a small plugin to popular the Tags editor for me. Yay for itch-scratching!