I have on my old SMF this thread:
But I create the same thread on XenForo, and I can't post it.
The caracters are from here:
Something I noticed is that they are 4-bytes UTF-8. Since MySQL utf8 datatype only supports up to 3 bytes, I think XenForo is not supporting whole 1-4 UTF-8 spectre, only BMP (as I read on other threads).
I already modified the DB (utf8mb4), and inserted those characters directly into mysql and I can read/visualize those kanjis in XenForo
So it seems before you try to store the data in the database, you "clean" the input from the text fields.
1) Any plans for supporting utf8mb4 on MySQL 5.5.3+?
2) Any easy way for me to change something in Xenforo that will allow me to post and save utf8 of 4 bytes, now that my database allows it?