The real reason I wrote my Emoji Detector library was for today's project. My website now has URLs that list every post containing specific emoji!
My site finds any emoji that I used in the post content, and indexes those in a separate database table. It uses that table to create a page listing all the emoji I've ever used, as well as emoji feeds showing all posts containing a specific emoji. Try it!
Behold: All the emoji I've used in posts, sorted by most used first!